Php exceptions
2 likes1,632 views
This document discusses proper use of exceptions in PHP programming. It defines common types of exceptions like logic exceptions and runtime exceptions. It recommends using exceptions instead of error flags for better control flow. Exceptions should provide descriptive error messages and stack traces. Exceptions should be thrown in the layer they occur and standard SPL exceptions used where possible. Unit tests can expect specific exception types and messages. Exceptions improve predictability over errors and make problems easier to find and fix.
1 of 18
Downloaded 44 times
![Ideal exception
● Tells you what happened, why it happened
and (if possible) how to fix it.
● Is ideal log message
● Is not thrown ;) Handle error in place where
it happened if you can.
Eg.
● new RuntimeException("Could not contact web service [url = $webServiceUrl, httpCode = $httpCode] to log user
in [user id = $userId].");
● throw new Canaldigital_PaymentService_Exception('Could not store customer product ' . "[Customer.id =
{$customer->id}; Product.id = {$product->id}].");
● throw new Exception("Auth server error"); // NOT!](https://image.slidesharecdn.com/phpexceptions-120531161722-phpapp02/85/Php-exceptions-10-320.jpg)
Ad
Recommended
Handling error & exception in php
Handling error & exception in phpPravasini Sahoo The document discusses handling errors and exceptions in PHP. It defines what errors and exceptions are, describes different types of PHP errors, and ways to handle them. It also covers setting up error handling functions and using exceptions with try/catch blocks to gracefully handle errors and exceptions in code.
PHP - Introduction to PHP Error Handling
PHP - Introduction to PHP Error HandlingVibrant Technologies & Computers The document provides an overview of PHP error handling, outlining three main categories: informational, actionable, and fatal errors. It details how to identify and customize handling of each error type, emphasizing the importance of proper error reporting settings during development and the option to suppress errors locally. Additionally, it describes how to create and register a custom error handler function to manage PHP errors effectively.
Php Error Handling
Php Error Handlingmussawir20 This document discusses error handling in PHP. It begins by explaining the different types of errors in PHP - notices, warnings, and fatal errors. It then provides examples of how to control which errors are displayed to the user, define custom error handlers, trigger custom errors, and use exception handling with try/catch blocks. The key aspects covered are how to intercept errors gracefully and provide user-friendly messages.
Errors, Exceptions & Logging (PHP Hants Oct '13)
Errors, Exceptions & Logging (PHP Hants Oct '13)James Titcumb The document discusses handling errors, exceptions, and logging in PHP, detailing types of errors such as fatal, warning, and notice. It emphasizes the importance of exceptions for control flow and error management in object-oriented programming and advocates for effective logging practices to track issues. The content also mentions various logging tools and methods compatible with PSR-3 standards.
Introduction to php exception and error management
Introduction to php exception and error managementbaabtra.com - No. 1 supplier of quality freshers This document discusses error management in PHP. It describes different types of errors like compile-time errors, fatal errors, recoverable errors, and warnings. It also discusses how to configure error reporting using php.ini directives like error_reporting, display_errors, and log_errors. Additionally, it explains how to handle errors programmatically using set_error_handler() and exception handling. The document provides an example of throwing and catching exceptions using try/catch blocks. Finally, it discusses lazy loading of classes using the __autoload() function in PHP.
Elegant Ways of Handling PHP Errors and Exceptions
Elegant Ways of Handling PHP Errors and ExceptionsZendCon The document discusses effective methods for handling PHP errors and exceptions, categorizing errors into external and logic types with varying severities. It emphasizes the importance of proper error management strategies, including displaying, logging, or ignoring errors, and introduces the concept of exceptions as a control mechanism for logic errors. The document also outlines how to create custom error and exception handlers to enhance error handling in PHP applications.
Error reporting in php
Error reporting in php Mudasir Syed This document discusses error reporting in PHP. It defines an error as a type of mistake, such as an incorrect program state. There are three main categories of errors in PHP: informational errors, actionable errors, and fatal errors. The document also discusses how to enable errors, set the error reporting level, suppress errors, create custom error handlers, and trigger errors programmatically.
Exceptions in PHP
Exceptions in PHPJanTvrdik The document discusses best practices for exception handling in programming, emphasizing the importance of specific exception types over generic ones. It outlines various scenarios and examples illustrating how to manage exceptions effectively, including the need for clear error messages and proper usage of namespaces. Additionally, it highlights the significance of documenting exceptions and avoiding displaying technical messages to end users.
Types of Error in PHP
Types of Error in PHPVineet Kumar Saini There are four main types of errors in PHP:
1. Parse (Syntax) Errors occur due to syntax mistakes and stop script execution. Common causes are unclosed quotes, missing parentheses, etc.
2. Fatal Errors are caused when PHP understands the code but can't perform the requested action, like calling an undefined function, and stop execution.
3. Warning Errors do not stop execution, examples include missing files or wrong number of function parameters.
4. Notice Errors are like Warning Errors in that execution continues, and occur when accessing undefined variables.
PHP - Introduction to PHP - Mazenet Solution
PHP - Introduction to PHP - Mazenet SolutionMazenetsolution The document provides an introduction to PHP including:
- PHP is an open source scripting language especially suited for web development and can be embedded into HTML.
- PHP code is executed on the server, generating HTML which is then sent to the client.
- PHP supports variables, operators, conditional statements, arrays, loops, functions, and forms. Key functions like $_GET and $_POST are used to collect form data submitted via GET and POST methods respectively.
Surprise! It's PHP :) (unabridged)
Surprise! It's PHP :) (unabridged)Sharon Levy The document is an unabridged PowerPoint presentation titled 'Surprise! It's PHP' by Sharon Lee Levy, covering various aspects of PHP programming, including its design history, common mistakes, and nuances in language constructs. It discusses key topics such as truth values, PHP's handling of variables and keywords, and coding standards. The presentation highlights both technical details and the evolution of PHP, referencing notable figures in its development.
Php(report)
Php(report)Yhannah This document provides an overview of basic PHP concepts including:
- PHP syntax with opening and closing tags <?php ?>
- Language constructs like echo and print for outputting strings
- Variables, data types, operators, and functions
- Conditional statements like if/else and switch statements
- Looping with while, do/while, and for loops
- Arrays for storing multiple values
- Form handling with $_GET and $_POST superglobals
- Connecting to databases using MySQLi or PDO extensions
The document covers PHP fundamentals and is intended as an introduction for learning the language. It explains core PHP concepts through examples and explanations in a step-by-step manner over 47 sections
Perl exceptions lightning talk
Perl exceptions lightning talkPeter Edwards This document summarizes a lightning talk on exceptions in Perl. It discusses defensive programming and the need to anticipate errors or incorrect input. It covers detecting exceptions, classifying exceptions by type and severity, and reporting exceptions. Finally, it reviews different methods for handling exceptions in Perl, including return codes, eval/die/rethrow, and various CPAN exception modules like Class::Throwable that provide try/catch functionality similar to other languages.
Bioinformatica 27-10-2011-p4-files
Bioinformatica 27-10-2011-p4-filesProf. Wim Van Criekinge The document discusses hashes in Perl programming. It explains that hashes allow the storage of key-value pairs and do not maintain order. It provides examples of creating a hash, accessing values using keys, and iterating through keys and values. It also discusses using hashes to store the genetic code and amino acid translations.
Lesson 4 constant
Lesson 4 constantMLG College of Learning, Inc Constants in PHP are like variables that cannot change value once defined. Constants are defined using the define() function, which takes a name, value, and optional case sensitivity parameter. Constants can store simple values as well as arrays. Unlike variables, constants are globally accessible across any PHP script.
PHP Basics
PHP BasicsBhaktaraz Bhatta This document provides an introduction to PHP basics, including variables, data types, operators, and errors. It discusses defining variables with the $ sign and rules for variable names. It also outlines different data types like strings, integers, floats, booleans, arrays, and objects. The document explains different types of operators for performing operations on variables and values. Finally, it describes common types of errors in PHP like syntax errors, logical errors, and run-time errors.
Introduction to PHP
Introduction to PHPJussi Pohjolainen The document provides an introduction to PHP, including:
- PHP is a scripting language originally designed for web pages and runs on most operating systems.
- PHP syntax is quite easy if familiar with C-type languages, and it is designed to output to browsers but can also create CLI apps.
- Variables, constants, naming conventions, data types, and basic control structures like if/else, while loops and foreach loops are discussed.
- Combining PHP with XHTML is covered, recommending using functions and an object-oriented approach.
- User input via forms is mentioned, linking to a resource on processing forms with PHP.
Introduction to PHP - Basics of PHP
Introduction to PHP - Basics of PHPwahidullah mudaser This document provides an introduction to PHP (Hypertext Preprocessor), which is a server-side scripting language used for web development. It discusses three-tiered websites, server-side scripting, and some key aspects of PHP including its history, basic syntax, variables, data types, functions, and conditional statements. PHP allows for dynamic content generation, computational processing, database access, and more on the server side to create interactive websites and web applications.
Exception handling in ASP .NET
Exception handling in ASP .NETbaabtra.com - No. 1 supplier of quality freshers This document discusses exception handling in .NET. It defines what exceptions are, how they are handled using try, catch, and finally blocks, and common exception types in .NET like IndexOutOfRangeException and NullReferenceException. It explains that exceptions allow error handling code to be separated from the main program logic and that finally blocks ensure cleanup code is always executed.
Basic of PHP
Basic of PHPNisa Soomro The document provides an overview of PHP concepts including variables, data types, functions, and more. It discusses PHP syntax like tags and comments. Key points covered include:
- PHP is a scripting language widely used for web development and is free to use
- Variables store and manipulate data in PHP and have no predefined type
- PHP has several data types including integers, doubles, strings, arrays, and objects
- Functions define reusable blocks of code and can accept parameters
- echo and print output content, with echo being marginally faster
Exception handling in asp.net
Exception handling in asp.netNeelesh Shukla - An error occurred during program execution that resulted in abnormal termination and wrong execution results.
- There are three main ways to handle exceptions in ASP.NET: using try-catch blocks, error events, and custom error pages.
- Try-catch blocks allow catching and handling specific exceptions, error events handle errors at the page and application level, and custom error pages display for all unhandled errors.
The PHP Way Of TDD - Think First, Code Later
The PHP Way Of TDD - Think First, Code LaterHiraq Citra M The document discusses test driven development (TDD) and its benefits. TDD follows a three step process: 1) write a test, 2) write code to pass the test, 3) refactor code. This results in readable, maintainable code. The document provides examples of writing tests using PHPUnit for simple "hello world" features in CakePHP and Laravel frameworks. TDD catches bugs early and allows developers to focus on design through writing tests for all features before implementation. Regular refactoring is also emphasized.
Methods of debugging - Atomate.net
Methods of debugging - Atomate.netVitalie Chiperi The document provides methods for debugging exceptions in PHP, including the use of try-catch blocks, setting exception and error handlers, and configuring PHP.ini settings for error display and reporting. It also discusses debugging tools like var_dump and Kint, as well as the technique of 'rubber duck debugging', where developers explain their code to an inanimate object to gain insights into solving problems. Additional resources for debugging in PHP, such as Xdebug and Laravel Debugbar, are mentioned.
Exception handling
Exception handlingIblesoft Exception handling in C# involves using try, catch, and finally blocks. The try block contains code that might throw exceptions, the catch block handles any exceptions, and finally contains cleanup code. There are different types of exceptions like OutOfMemoryException and DivideByZeroException. Exceptions can be handled by showing error messages, logging exceptions, or throwing custom exceptions for business rule violations.
Error and Exception Handling in PHP
Error and Exception Handling in PHPArafat Hossan The document discusses error and exception handling in PHP, outlining processes for managing errors through functions like die() and defining custom error handlers. It details various error levels and the structure of exception handling, including try, throw, and catch blocks. Additionally, it explains how to create custom exception handlers for improved error management.
Python Programming Essentials - M21 - Exception Handling
Python Programming Essentials - M21 - Exception HandlingP3 InfoTech Solutions Pvt. Ltd. This document discusses exception handling in Python. It explains that exceptions are errors that occur during program execution and can be handled using try, except, and raise keywords. The document covers throwing exceptions, catching exceptions using try/except blocks, propagating exceptions, using try/except/else and try/except/finally, and some common built-in Python exceptions. It also provides an example of defining a custom exception class.
Presentation1
Presentation1Anul Chaudhary This document discusses exception handling in C#. It defines an exception as a problem that arises during program execution, such as dividing by zero. It describes how try, catch, and finally keywords allow programmers to transfer control when exceptions occur. The try block identifies code that could cause exceptions. Catch blocks handle specific exception types. Finally blocks contain code that always executes regardless of exceptions. Common exception classes derive from System.Exception. The example shows a method catching and handling a DivideByZeroException using try, catch, and finally.
Php using variables-operators
Php using variables-operatorsKhem Puthea 1) The document provides an introduction to PHP basics including variables, data types, operators, and form handling. It explains how to store data in variables, assign values, destroy variables, and inspect variable contents.
2) Various PHP data types are covered such as integers, floats, strings, booleans, and NULL. Arithmetic, comparison, logical and assignment operators are also explained.
3) The document demonstrates how to manipulate variables using operators, perform arithmetic operations, concatenate strings, compare variables, and perform logical tests.
Object Oriented PHP - PART-2
Object Oriented PHP - PART-2Jalpesh Vasa This document discusses object oriented PHP concepts including classes, inheritance, overriding functions, error handling, and file uploads. It provides examples of creating a class with methods, instantiating objects, extending classes, overriding parent methods, and defining custom error handling functions. It also demonstrates how to upload files in PHP by handling the file on the server, checking for errors, and moving the file to a target directory.
Effective PHP. Part 6
Effective PHP. Part 6Vasily Kartashov The document discusses effective PHP logging and exception handling using the PSR-3 logger standard, highlighting log levels like emergency, critical, error, warning, info, and debug. It emphasizes the importance of using standard exceptions and capturing additional information when creating bespoke exceptions, as well as appropriate handling strategies for exceptions without ignoring them. Overall, good logging practices are essential, with a focus on clarity and maintaining code cleanliness.
More Related Content
What's hot (20)
Types of Error in PHP
Types of Error in PHPVineet Kumar Saini There are four main types of errors in PHP:
1. Parse (Syntax) Errors occur due to syntax mistakes and stop script execution. Common causes are unclosed quotes, missing parentheses, etc.
2. Fatal Errors are caused when PHP understands the code but can't perform the requested action, like calling an undefined function, and stop execution.
3. Warning Errors do not stop execution, examples include missing files or wrong number of function parameters.
4. Notice Errors are like Warning Errors in that execution continues, and occur when accessing undefined variables.
PHP - Introduction to PHP - Mazenet Solution
PHP - Introduction to PHP - Mazenet SolutionMazenetsolution The document provides an introduction to PHP including:
- PHP is an open source scripting language especially suited for web development and can be embedded into HTML.
- PHP code is executed on the server, generating HTML which is then sent to the client.
- PHP supports variables, operators, conditional statements, arrays, loops, functions, and forms. Key functions like $_GET and $_POST are used to collect form data submitted via GET and POST methods respectively.
Surprise! It's PHP :) (unabridged)
Surprise! It's PHP :) (unabridged)Sharon Levy The document is an unabridged PowerPoint presentation titled 'Surprise! It's PHP' by Sharon Lee Levy, covering various aspects of PHP programming, including its design history, common mistakes, and nuances in language constructs. It discusses key topics such as truth values, PHP's handling of variables and keywords, and coding standards. The presentation highlights both technical details and the evolution of PHP, referencing notable figures in its development.
Php(report)
Php(report)Yhannah This document provides an overview of basic PHP concepts including:
- PHP syntax with opening and closing tags <?php ?>
- Language constructs like echo and print for outputting strings
- Variables, data types, operators, and functions
- Conditional statements like if/else and switch statements
- Looping with while, do/while, and for loops
- Arrays for storing multiple values
- Form handling with $_GET and $_POST superglobals
- Connecting to databases using MySQLi or PDO extensions
The document covers PHP fundamentals and is intended as an introduction for learning the language. It explains core PHP concepts through examples and explanations in a step-by-step manner over 47 sections
Perl exceptions lightning talk
Perl exceptions lightning talkPeter Edwards This document summarizes a lightning talk on exceptions in Perl. It discusses defensive programming and the need to anticipate errors or incorrect input. It covers detecting exceptions, classifying exceptions by type and severity, and reporting exceptions. Finally, it reviews different methods for handling exceptions in Perl, including return codes, eval/die/rethrow, and various CPAN exception modules like Class::Throwable that provide try/catch functionality similar to other languages.
Bioinformatica 27-10-2011-p4-files
Bioinformatica 27-10-2011-p4-filesProf. Wim Van Criekinge The document discusses hashes in Perl programming. It explains that hashes allow the storage of key-value pairs and do not maintain order. It provides examples of creating a hash, accessing values using keys, and iterating through keys and values. It also discusses using hashes to store the genetic code and amino acid translations.
Lesson 4 constant
Lesson 4 constantMLG College of Learning, Inc Constants in PHP are like variables that cannot change value once defined. Constants are defined using the define() function, which takes a name, value, and optional case sensitivity parameter. Constants can store simple values as well as arrays. Unlike variables, constants are globally accessible across any PHP script.
PHP Basics
PHP BasicsBhaktaraz Bhatta This document provides an introduction to PHP basics, including variables, data types, operators, and errors. It discusses defining variables with the $ sign and rules for variable names. It also outlines different data types like strings, integers, floats, booleans, arrays, and objects. The document explains different types of operators for performing operations on variables and values. Finally, it describes common types of errors in PHP like syntax errors, logical errors, and run-time errors.
Introduction to PHP
Introduction to PHPJussi Pohjolainen The document provides an introduction to PHP, including:
- PHP is a scripting language originally designed for web pages and runs on most operating systems.
- PHP syntax is quite easy if familiar with C-type languages, and it is designed to output to browsers but can also create CLI apps.
- Variables, constants, naming conventions, data types, and basic control structures like if/else, while loops and foreach loops are discussed.
- Combining PHP with XHTML is covered, recommending using functions and an object-oriented approach.
- User input via forms is mentioned, linking to a resource on processing forms with PHP.
Introduction to PHP - Basics of PHP
Introduction to PHP - Basics of PHPwahidullah mudaser This document provides an introduction to PHP (Hypertext Preprocessor), which is a server-side scripting language used for web development. It discusses three-tiered websites, server-side scripting, and some key aspects of PHP including its history, basic syntax, variables, data types, functions, and conditional statements. PHP allows for dynamic content generation, computational processing, database access, and more on the server side to create interactive websites and web applications.
Exception handling in ASP .NET
Exception handling in ASP .NETbaabtra.com - No. 1 supplier of quality freshers This document discusses exception handling in .NET. It defines what exceptions are, how they are handled using try, catch, and finally blocks, and common exception types in .NET like IndexOutOfRangeException and NullReferenceException. It explains that exceptions allow error handling code to be separated from the main program logic and that finally blocks ensure cleanup code is always executed.
Basic of PHP
Basic of PHPNisa Soomro The document provides an overview of PHP concepts including variables, data types, functions, and more. It discusses PHP syntax like tags and comments. Key points covered include:
- PHP is a scripting language widely used for web development and is free to use
- Variables store and manipulate data in PHP and have no predefined type
- PHP has several data types including integers, doubles, strings, arrays, and objects
- Functions define reusable blocks of code and can accept parameters
- echo and print output content, with echo being marginally faster
Exception handling in asp.net
Exception handling in asp.netNeelesh Shukla - An error occurred during program execution that resulted in abnormal termination and wrong execution results.
- There are three main ways to handle exceptions in ASP.NET: using try-catch blocks, error events, and custom error pages.
- Try-catch blocks allow catching and handling specific exceptions, error events handle errors at the page and application level, and custom error pages display for all unhandled errors.
The PHP Way Of TDD - Think First, Code Later
The PHP Way Of TDD - Think First, Code LaterHiraq Citra M The document discusses test driven development (TDD) and its benefits. TDD follows a three step process: 1) write a test, 2) write code to pass the test, 3) refactor code. This results in readable, maintainable code. The document provides examples of writing tests using PHPUnit for simple "hello world" features in CakePHP and Laravel frameworks. TDD catches bugs early and allows developers to focus on design through writing tests for all features before implementation. Regular refactoring is also emphasized.
Methods of debugging - Atomate.net
Methods of debugging - Atomate.netVitalie Chiperi The document provides methods for debugging exceptions in PHP, including the use of try-catch blocks, setting exception and error handlers, and configuring PHP.ini settings for error display and reporting. It also discusses debugging tools like var_dump and Kint, as well as the technique of 'rubber duck debugging', where developers explain their code to an inanimate object to gain insights into solving problems. Additional resources for debugging in PHP, such as Xdebug and Laravel Debugbar, are mentioned.
Exception handling
Exception handlingIblesoft Exception handling in C# involves using try, catch, and finally blocks. The try block contains code that might throw exceptions, the catch block handles any exceptions, and finally contains cleanup code. There are different types of exceptions like OutOfMemoryException and DivideByZeroException. Exceptions can be handled by showing error messages, logging exceptions, or throwing custom exceptions for business rule violations.
Error and Exception Handling in PHP
Error and Exception Handling in PHPArafat Hossan The document discusses error and exception handling in PHP, outlining processes for managing errors through functions like die() and defining custom error handlers. It details various error levels and the structure of exception handling, including try, throw, and catch blocks. Additionally, it explains how to create custom exception handlers for improved error management.
Python Programming Essentials - M21 - Exception Handling
Python Programming Essentials - M21 - Exception HandlingP3 InfoTech Solutions Pvt. Ltd. This document discusses exception handling in Python. It explains that exceptions are errors that occur during program execution and can be handled using try, except, and raise keywords. The document covers throwing exceptions, catching exceptions using try/except blocks, propagating exceptions, using try/except/else and try/except/finally, and some common built-in Python exceptions. It also provides an example of defining a custom exception class.
Presentation1
Presentation1Anul Chaudhary This document discusses exception handling in C#. It defines an exception as a problem that arises during program execution, such as dividing by zero. It describes how try, catch, and finally keywords allow programmers to transfer control when exceptions occur. The try block identifies code that could cause exceptions. Catch blocks handle specific exception types. Finally blocks contain code that always executes regardless of exceptions. Common exception classes derive from System.Exception. The example shows a method catching and handling a DivideByZeroException using try, catch, and finally.
Php using variables-operators
Php using variables-operatorsKhem Puthea 1) The document provides an introduction to PHP basics including variables, data types, operators, and form handling. It explains how to store data in variables, assign values, destroy variables, and inspect variable contents.
2) Various PHP data types are covered such as integers, floats, strings, booleans, and NULL. Arithmetic, comparison, logical and assignment operators are also explained.
3) The document demonstrates how to manipulate variables using operators, perform arithmetic operations, concatenate strings, compare variables, and perform logical tests.
Similar to Php exceptions (20)
Object Oriented PHP - PART-2
Object Oriented PHP - PART-2Jalpesh Vasa This document discusses object oriented PHP concepts including classes, inheritance, overriding functions, error handling, and file uploads. It provides examples of creating a class with methods, instantiating objects, extending classes, overriding parent methods, and defining custom error handling functions. It also demonstrates how to upload files in PHP by handling the file on the server, checking for errors, and moving the file to a target directory.
Effective PHP. Part 6
Effective PHP. Part 6Vasily Kartashov The document discusses effective PHP logging and exception handling using the PSR-3 logger standard, highlighting log levels like emergency, critical, error, warning, info, and debug. It emphasizes the importance of using standard exceptions and capturing additional information when creating bespoke exceptions, as well as appropriate handling strategies for exceptions without ignoring them. Overall, good logging practices are essential, with a focus on clarity and maintaining code cleanliness.
Exception
Exceptionbaabtra.com - No. 1 supplier of quality freshers This document discusses exception handling in programming. It provides an overview of exceptions, including that exceptions are objects that are thrown when errors occur and can be handled through try, catch, and throw blocks. It also provides examples of basic exception handling, creating custom exception classes, handling multiple exceptions, re-throwing exceptions, and setting a top-level exception handler. Finally, it summarizes the key components of the Exception base class that all exceptions inherit from.
Code Fast, Die Young, Throw Structured Exceptions
Code Fast, Die Young, Throw Structured ExceptionsJohn Anderson The document discusses best practices for exception handling in Perl. It recommends using structured exceptions by throwing objects instead of strings to provide more context. This avoids issues with duplicated error messages. It presents the Exception::Class and Throwable modules which allow defining exception hierarchies as classes or roles. The document also advises throwing exceptions as early as possible and only catching them to handle errors, not for logging.
Error handling
Error handlingMeherul1234 The document provides guidance on handling errors in PHP programming, emphasizing the necessity of professional error management in production environments. It classifies runtime errors into notices, warnings, and fatal errors, and explains how to create custom error handling functions using 'set_error_handler()' and 'trigger_error()'. Additionally, it discusses an exception-based approach with try-catch blocks for managing errors effectively.
Errors, Exceptions & Logging (PHPNW13 Uncon)
Errors, Exceptions & Logging (PHPNW13 Uncon)James Titcumb This document discusses errors, exceptions, and logging in PHP. It describes the different types of PHP errors and how exceptions can be used to handle errors and failures more object-oriented way. Exceptions allow for more descriptive error handling than basic errors. The document also recommends logging errors and exceptions for easier debugging. Various logging options for PHP are presented, including Monolog and other libraries that support the PSR-3 logging standard. Capturing errors, exceptions, and logging messages is discussed.
Module-4_WTA_PHP Class & Error Handling
Module-4_WTA_PHP Class & Error HandlingSIVAKUMAR V The document outlines the structure and functionality of PHP arrays, including multidimensional and superglobal arrays, which are always in scope for easy access. It explains error and exception handling in PHP, categorizing errors into expected errors, warnings, and fatal errors, and discusses error reporting settings and mechanisms for handling runtime errors. Additionally, it touches upon custom exception handlers to improve user experience and provide relevant application information during errors.
Exception Handling_ Mastering the Art of Dealing with Errors and Exceptions.pdf
Exception Handling_ Mastering the Art of Dealing with Errors and Exceptions.pdfRamirezCarl This document covers various aspects of exception handling, including built-in exceptions, try/except blocks, creating custom exceptions, best practices, debugging techniques, and context managers. It provides examples and explanations of concepts like raising, catching, and handling exceptions at different levels of a program. The document also presents a real-world code example to demonstrate exception handling principles.
object oriented programming in PHP & Functions
object oriented programming in PHP & FunctionsBackiyalakshmiVenkat El documento explica el uso de funciones en PHP, describiendo su importancia en la reutilización, mantenimiento y organización del código. Se presentan dos tipos de funciones: las incorporadas y las definidas por el usuario, junto con ejemplos de cada una, y se discuten conceptos como pasar parámetros, devolver valores, y el manejo de excepciones. Además, se abordan temas relacionados con la gestión de archivos, programación orientada a objetos, y el manejo de errores utilizando estructuras como try-catch.
Design byexceptions
Design byexceptionsAsif Tasleem Exceptions are events that disrupt normal program flow. There are three main types: checked exceptions for anticipated errors, errors for unanticipated external errors, and runtime exceptions for unanticipated internal errors. Exceptions separate error handling code from regular code, allow errors to propagate up the call stack, and group error types into a class hierarchy. Well-designed exceptions indicate broken contracts between code modules. Developers should throw specific exception types to indicate different error conditions rather than generic exceptions.
Code Fast, die() Early, Throw Structured Exceptions
Code Fast, die() Early, Throw Structured ExceptionsJohn Anderson The document discusses exception handling in Perl, comparing 'classic' and 'semi-modern' approaches, and introduces structured exceptions using frameworks like exception::class and roles like throwable. It emphasizes best practices for error handling, such as throwing exceptions early, using structured data for exceptions, and avoiding unnecessary catches. The presentation concludes with suggestions for further reading on the topic and encourages improving exception handling practices.
PHP Exception handler
PHP Exception handlerRavi Raj Throwing and catching exceptions in PHP is important to prevent errors from breaking applications, but on websites it is better to handle exceptions internally by bubbling them up to a central exception handler where they can be logged and error pages displayed. Exception classes should extend the base Exception class and be organized in a layered structure corresponding to the application design to make it clear what types of exceptions can be thrown and caught. Sample code demonstrates how to define custom exception classes corresponding to different error scenarios and catch them selectively to perform specific error handling actions.
errors in php 7
errors in php 7Damien Seguy This document discusses PHP 7.0's error messages. It begins with an agenda to review 2200 error messages and discuss new features, traps, and messages. The speaker is identified as the CTO of exakat, a PHP static auditing engine. The top discusses evolving error messages by searching code repositories and outlines the top 5 error messages found in the source code and via Google searches. It then outlines new error messages, better linting, removed messages, and cryptic messages.
Exception handling
Exception handlingzindadili Exception handling in C++ provides a standard mechanism for processing errors. Exceptions indicate problems during a program's execution and exception handling allows a program to continue running or notify the user of problems. The key components are try blocks for code that could cause exceptions, catch handlers to handle specific exceptions, and stack unwinding to search for exception handlers up the call stack if an exception is not caught. Derived exception classes enable related errors to be caught together under a base class.
Lecture 3.1.1 Try Throw Catch.pptx
Lecture 3.1.1 Try Throw Catch.pptxsunilsoni446112 The document discusses object oriented programming using C++. It covers the course objectives, which are to enable students to understand C++ constructs and relate them to engineering problems, and to improve their ability to analyze and address programming problems. It also lists the course outcomes and evaluation scheme. The content section defines exceptions, discusses exception handling using try, throw and catch, and covers the advantages and mechanism of exception handling. It provides examples of try-catch blocks and explains how to use exception handling in functions. Key applications of exception handling are also discussed.
9781337102087 ppt ch14
9781337102087 ppt ch14Terry Yoast The document discusses exception handling in C++. It covers try/catch blocks for handling exceptions, throwing exceptions, and creating custom exception classes. The key aspects are using try/catch blocks to handle exceptions, throwing exceptions within try blocks, and creating exception classes that inherit from the base exception class. Catch blocks specify the exception type and contain handling code. Exceptions not caught will terminate the program through stack unwinding.
TDC 2015 - POA - Trilha PHP - Shit Happens
TDC 2015 - POA - Trilha PHP - Shit HappensJackson F. de A. Mafra This document discusses logging and summarization techniques. It begins with an overview of why logging is important for application development and maintenance. It then covers different types of logs, such as system logs, application logs, and database logs. The document discusses various logging options and frameworks, with a focus on Monolog and the ELK stack. It provides examples of setting up logging with Monolog and sending logs to Elasticsearch using Logstash and viewing them in Kibana. The key aspects covered are the need for logging, different log types, popular logging frameworks and real-time log analysis using ELK.
Exception handling chapter15
Exception handling chapter15Kumar This chapter discusses exception handling in C++. It introduces exceptions as undesirable events detectable during program execution. Try/catch blocks are used to handle exceptions, where code that may trigger exceptions is placed in a try block and catch blocks specify the exception type and contain handling code. Catch blocks are checked in order to handle matching exceptions. The chapter covers built-in C++ exception classes and creating custom exception classes, as well as rethrowing, stack unwinding, and different techniques for exception handling.
Review unknown code with static analysis - bredaphp
Review unknown code with static analysis - bredaphpDamien Seguy The document discusses static analysis for PHP code, detailing methods for reviewing unknown code, using tools like Exakat and PHP lint to identify syntax errors and code structure metrics. It presents various issues found during analysis, including compatibility errors from PHP version migrations and semantic code concerns. Key metrics and automated analysis techniques are shared to improve code quality and maintain best practices.
Exception Handling
Exception Handlingbaabtra.com - No. 1 supplier of quality freshers This document discusses exceptions in Python programming. It defines an exception as an event that disrupts normal program flow, such as a runtime error. The document explains how to handle exceptions using try and except blocks. Code is provided to demonstrate catching specific exception types, catching all exceptions, and raising new exceptions. Finally, it notes that exceptions can provide additional error details through arguments.
Ad
Recently uploaded (20)
Security Tips for Enterprise Azure Solutions
Security Tips for Enterprise Azure SolutionsMichele Leroux Bustamante Delivering solutions to Azure may involve a variety of architecture patterns involving your applications, APIs data and associated Azure resources that comprise the solution. This session will use reference architectures to illustrate the security considerations to protect your Azure resources and data, how to achieve Zero Trust, and why it matters. Topics covered will include specific security recommendations for types Azure resources and related network security practices. The goal is to give you a breadth of understanding as to typical security requirements to meet compliance and security controls in an enterprise solution.
AI VIDEO MAGAZINE - June 2025 - r/aivideo
AI VIDEO MAGAZINE - June 2025 - r/aivideo1pcity Studios, Inc AI VIDEO MAGAZINE - r/aivideo community newsletter – Exclusive Tutorials: How to make an AI VIDEO from scratch, PLUS: How to make AI MUSIC, Hottest ai videos of 2025, Exclusive Interviews, New Tools, Previews, and MORE - JUNE 2025 ISSUE -
Curietech AI in action - Accelerate MuleSoft development
Curietech AI in action - Accelerate MuleSoft developmentshyamraj55 CurieTech AI in Action – Accelerate MuleSoft Development
Overview:
This presentation demonstrates how CurieTech AI’s purpose-built agents empower MuleSoft developers to create integration workflows faster, more accurately, and with less manual effort
linkedin.com
+12
curietech.ai
+12
meetups.mulesoft.com
+12
.
Key Highlights:
Dedicated AI agents for every stage: Coding, Testing (MUnit), Documentation, Code Review, and Migration
curietech.ai
+7
curietech.ai
+7
medium.com
+7
DataWeave automation: Generate mappings from tables or samples—95%+ complete within minutes
linkedin.com
+7
curietech.ai
+7
medium.com
+7
Integration flow generation: Auto-create Mule flows based on specifications—speeds up boilerplate development
curietech.ai
+1
medium.com
+1
Efficient code reviews: Gain intelligent feedback on flows, patterns, and error handling
youtube.com
+8
curietech.ai
+8
curietech.ai
+8
Test & documentation automation: Auto-generate MUnit test cases, sample data, and detailed docs from code
curietech.ai
+5
curietech.ai
+5
medium.com
+5
Why Now?
Achieve 10× productivity gains, slashing development time from hours to minutes
curietech.ai
+3
curietech.ai
+3
medium.com
+3
Maintain high accuracy with code quality matching or exceeding manual efforts
curietech.ai
+2
curietech.ai
+2
curietech.ai
+2
Ideal for developers, architects, and teams wanting to scale MuleSoft projects with AI efficiency
Conclusion:
CurieTech AI transforms MuleSoft development into an AI-accelerated workflow—letting you focus on innovation, not repetition.
PyCon SG 25 - Firecracker Made Easy with Python.pdf
PyCon SG 25 - Firecracker Made Easy with Python.pdfMuhammad Yuga Nugraha Explore the ease of managing Firecracker microVM with the firecracker-python. In this session, I will introduce the basics of Firecracker microVM and demonstrate how this custom SDK facilitates microVM operations easily. We will delve into the design and development process behind the SDK, providing a behind-the-scenes look at its creation and features. While traditional Firecracker SDKs were primarily available in Go, this module brings a simplicity of Python to the table.
AI vs Human Writing: Can You Tell the Difference?
AI vs Human Writing: Can You Tell the Difference?Shashi Sathyanarayana, Ph.D This slide illustrates a side-by-side comparison between human-written, AI-written, and ambiguous content. It highlights subtle cues that help readers assess authenticity, raising essential questions about the future of communication, trust, and thought leadership in the age of generative AI.
Cracking the Code - Unveiling Synergies Between Open Source Security and AI.pdf
Cracking the Code - Unveiling Synergies Between Open Source Security and AI.pdfPriyanka Aash Cracking the Code - Unveiling Synergies Between Open Source Security and AI
"How to survive Black Friday: preparing e-commerce for a peak season", Yurii ...
"How to survive Black Friday: preparing e-commerce for a peak season", Yurii ...Fwdays We will explore how e-commerce projects prepare for the busiest time of the year, which key aspects to focus on, and what to expect. We’ll share our experience in setting up auto-scaling, load balancing, and discuss the loads that Silpo handles, as well as the solutions that help us navigate this season without failures.
Salesforce Summer '25 Release Frenchgathering.pptx.pdf
Salesforce Summer '25 Release Frenchgathering.pptx.pdfyosra Saidani Salesforce Summer '25 Release Frenchgathering.pptx.pdf
" How to survive with 1 billion vectors and not sell a kidney: our low-cost c...
" How to survive with 1 billion vectors and not sell a kidney: our low-cost c...Fwdays Let's talk about our history. How we started the project with a small vector database of less than 2 million records. Later, we received a request for +100 million records, then another +100... And so gradually we reached almost 1 billion. Standard tools were quickly running out of steam - we were running into performance, index size, and very limited resources. After a long series of trials and errors, we built our own low-cost cluster, which today stably processes thousands of queries to more than 1B vectors.
Cluster-Based Multi-Objective Metamorphic Test Case Pair Selection for Deep N...
Cluster-Based Multi-Objective Metamorphic Test Case Pair Selection for Deep N...janeliewang985 the slides of the MP selection approach CMPS
CapCut Pro Crack For PC Latest Version {Fully Unlocked} 2025
CapCut Pro Crack For PC Latest Version {Fully Unlocked} 2025pcprocore 👉𝗡𝗼𝘁𝗲:𝗖𝗼𝗽𝘆 𝗹𝗶𝗻𝗸 & 𝗽𝗮𝘀𝘁𝗲 𝗶𝗻𝘁𝗼 𝗚𝗼𝗼𝗴𝗹𝗲 𝗻𝗲𝘄 𝘁𝗮𝗯> https://pcprocore.com/ 👈◀
CapCut Pro Crack is a powerful tool that has taken the digital world by storm, offering users a fully unlocked experience that unleashes their creativity. With its user-friendly interface and advanced features, it’s no wonder why aspiring videographers are turning to this software for their projects.
Connecting Data and Intelligence: The Role of FME in Machine Learning
Connecting Data and Intelligence: The Role of FME in Machine LearningSafe Software In this presentation, we want to explore powerful data integration and preparation for Machine Learning. FME is known for its ability to manipulate and transform geospatial data, connecting diverse data sources into efficient and automated workflows. By integrating FME with Machine Learning techniques, it is possible to transform raw data into valuable insights faster and more accurately, enabling intelligent analysis and data-driven decision making.
Using the SQLExecutor for Data Quality Management: aka One man's love for the...
Using the SQLExecutor for Data Quality Management: aka One man's love for the...Safe Software The SQLExecutor is one of FME’s most powerful and flexible transformers. Pivvot maintains a robust internal metadata hierarchy used to support ingestion and curation of thousands of external data sources that must be managed for quality before entering our platform. By using the SQLExecutor, Pivvot can efficiently detect problems and perform analysis before data is extracted from our staging environment, removing the need for rollbacks or cycles waisted on a failed job. This presentation will walk through three distinct examples of how Pivvot uses the SQLExecutor to engage its metadata hierarchy and integrate with its Data Quality Management workflows efficiently and within the source postgres database. Spatial Validation –Validating spatial prerequisites before entering a production environment. Reference Data Validation - Dynamically validate domain-ed columns across any table and multiple columns per table. Practical De-duplication - Removing identical or near-identical well point locations from two distinct source datasets in the same table.
9-1-1 Addressing: End-to-End Automation Using FME
9-1-1 Addressing: End-to-End Automation Using FMESafe Software This session will cover a common use case for local and state/provincial governments who create and/or maintain their 9-1-1 addressing data, particularly address points and road centerlines. In this session, you'll learn how FME has helped Shelby County 9-1-1 (TN) automate the 9-1-1 addressing process; including automatically assigning attributes from disparate sources, on-the-fly QAQC of said data, and reporting. The FME logic that this presentation will cover includes: Table joins using attributes and geometry, Looping in custom transformers, Working with lists and Change detection.
You are not excused! How to avoid security blind spots on the way to production
You are not excused! How to avoid security blind spots on the way to productionMichele Leroux Bustamante We live in an ever evolving landscape for cyber threats creating security risk for your production systems. Mitigating these risks requires participation throughout all stages from development through production delivery - and by every role including architects, developers QA and DevOps engineers, product owners and leadership. No one is excused! This session will cover examples of common mistakes or missed opportunities that can lead to vulnerabilities in production - and ways to do better throughout the development lifecycle.
GenAI Opportunities and Challenges - Where 370 Enterprises Are Focusing Now.pdf
GenAI Opportunities and Challenges - Where 370 Enterprises Are Focusing Now.pdfPriyanka Aash GenAI Opportunities and Challenges - Where 370 Enterprises Are Focusing Now
Quantum AI Discoveries: Fractal Patterns Consciousness and Cyclical Universes
Quantum AI Discoveries: Fractal Patterns Consciousness and Cyclical UniversesSaikat Basu Embark on a cosmic journey exploring the intersection of quantum
computing, consciousness, and ancient wisdom. Together we'll uncover the
recursive patterns that bind our reality.
You are not excused! How to avoid security blind spots on the way to production
You are not excused! How to avoid security blind spots on the way to productionMichele Leroux Bustamante
Ad
Php exceptions
- 1. PHP Exceptions tips How to use exceptions properly? Damian Sromek damiansromek.pl 2012-05
- 2. What's an exception? Software can not finish task by performing regular scenario and you should not ignore it. ● External system does not work eg. database, network, filesystem ● Software is used/configured wrong eg. credentials not set ● There's a bug in software eg. somehow program came to invalid state, object was requested to do something inappropriate / "stupid"
- 3. What's NOT an exception? Software can not finish a task but you know it's nothing strange when some criteria are not met. ● Validator failure eg. wrong form field value, wrong credentials when logging in Database access methods ● findByPK - should return "null" if no unique result ● findAll - should return empty collection if no results
- 4. Main types of exceptions ● LogicException Software got to wrong state but it will not happen again when programmer fixes the code eg. filling missing configuration, better form validation ● RuntimeException Software got to wrong state because of external dependency that could not have been avoided any way eg. network error, database failure
- 5. PHP spl exceptions http://php.net/manual/en/language.exceptions.php http://www.php.net/manual/en/spl.exceptions.php Sadly there's not much about exceptions in PHP documentation. http://www.php.net/~helly/php/ext/spl/classException.html Exception LogicException BadFunctionCallException BadMethodCallException DomainException InvalidArgumentException LengthException OutOfRangeException RuntimeException OutOfBoundsException OverflowException RangeException UnderflowException UnexpectedValueException
- 6. Exceptions instead of PHP errors Convert PHP errors to exception to get better control over your software http://www.php.net/manual/en/class.errorexception.php <?php function exception_error_handler ($errno, $errstr, $errfile , $errline ) { throw new ErrorException ($errstr, 0, $errno, $errfile , $errline ); } set_error_handler ("exception_error_handler" );
- 7. Problems with exceptions ● Some use them to control the flow of application ● Sometimes it's hard to distinguish which exception class to use ● Topic is not as much highlighted as it should be :(
- 8. Benefits (when used properly) ● Software is much more predictable and user friendly when there are some problems with external system (WebService) etc. ● It's much easier to find out what failed ● It's much easier to find the bug
- 9. Main advantages over error flags (booleans, integers etc.) ● Much less "if" statements which results in more maintainable code ● You can explain why software fails by sending descriptive message and stack trace
- 10. Ideal exception ● Tells you what happened, why it happened and (if possible) how to fix it. ● Is ideal log message ● Is not thrown ;) Handle error in place where it happened if you can. Eg. ● new RuntimeException("Could not contact web service [url = $webServiceUrl, httpCode = $httpCode] to log user in [user id = $userId]."); ● throw new Canaldigital_PaymentService_Exception('Could not store customer product ' . "[Customer.id = {$customer->id}; Product.id = {$product->id}]."); ● throw new Exception("Auth server error"); // NOT!
- 11. Layer/library exceptions ● Use spl exceptions as much as possible ● Use "marker interface" to group exceptions thrown by library etc. eg. like in Symfony2, Zend Framework 2 namespace MyApi; interface Exception {}; class RuntimeException extends RuntimeException {}; // so you can handle specific module/layer exceptions try { ... } catch (MyApiRuntimeException $myApiRuntimeEx) { ... } catch (MyApiException $myApiEx) { .. } catch (RuntimeException $runtimeEx) { ... }
- 12. Do NOT! ● empty try-catch If you don't know what to do with exception/error just let it go up! At the point when context let you decide what to do now you can handle it in the right way.
- 13. PHPDoc @throws DbException on DB error or even better @throws MethodNotAllowedHttpException // self describing
- 14. Testing exceptions ● @expectedException InvalidArgumentException ● @expectedExceptionMessage Right Message (@see assertContains) ● @expectedExceptionCode 20 ● http://www.phpunit.de/manual/current/en/writing-tests-for-phpunit. html#writing-tests-for-phpunit.exceptions
- 15. Appendix A - Exceptions in PHP doc class LogicException extends Exception Exception that represents error in the program logic. This kind of exceptions should directly leed to a fix in your code - Exception that represents error in the program logic. This kind of exceptions should directly lead to a fix in your code. class BadFunctionCallException extends LogicException Exception thrown when a function call was illegal. - Exception thrown if a callback refers to an undefined function or if some arguments are missing. class BadMethodCallException extends BadFunctionCallException Exception thrown when a method call was illegal - Exception thrown if a callback refers to an undefined method or if some arguments are missing. class DomainException extends LogicException Exception that denotes a value not in the valid domain was used. This kind of exception should be used to inform about domain erors in mathematical sense. - Exception thrown if a value does not adhere to a defined valid data domain. class InvalidArgumentException extends LogicException Exception that denotes invalid arguments were passed. - Exception thrown if an argument does not match with the expected value.
- 16. Appendix A - Exceptions in PHP doc class LengthException extends LogicException Exception thrown when a parameter exceeds the allowed length. This can be used for strings length, array size, file size, number of elements read from an Iterator and so on. - Exception thrown if a length is invalid. class OutOfRangeException extends LogicException Exception thrown when an illegal index was requested. This represents errors that should be detected at compile time. - Exception thrown when an illegal index was requested. This represents errors that should be detected at compile time. class RuntimeException extends Exception Exception thrown for errors that are only detectable at runtime. class OutOfBoundsException extends RuntimeException Exception thrown when an illegal index was requested. This represents errors that cannot be detected at compile time. - Exception thrown if a value is not a valid key. This represents errors that cannot be detected at compile time. class OverflowException extends RuntimeException Exception thrown to indicate arithmetic/buffer overflow. - Exception thrown when adding an element to a full container.
- 17. Appendix A - Exceptions in PHP doc class RangeException extends RuntimeException Exception thrown to indicate range errors during program execution. Normally this means there was an arithmetic error other than under/overflow. This is the runtime version of DomainException. - Exception thrown to indicate range errors during program execution. Normally this means there was an arithmetic error other than under/overflow. This is the runtime version of DomainException. class UnderflowException extends RuntimeException Exception thrown to indicate arithmetic/buffer underflow. - Exception thrown when performing an invalid operation on an empty container, such as removing an element. UnexpectedValueException extends RuntimeException - Exception thrown if a value does not match with a set of values. Typically this happens when a function calls another function and expects the return value to be of a certain type or value not including arithmetic or buffer related errors.
- 18. Thank you :)