PHP tutorial | ptutorial

Nov 7, 2014Download as pptx, pdf

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This document introduces PHP by explaining what it is, why it is used, its basic syntax, and how to work with variables, comments, and echo statements in PHP. PHP is a server-side scripting language used for web development that runs on web servers. It allows for dynamic web page creation and easy embedding of PHP code into HTML. PHP code is executed on the server, and it can communicate with databases and generate secure web pages.

Introduction of PHP
By Umar Farooque Khan
http://www.ptutorial.com

What is PHP?
• PHP stand for hypertext pre-processor.
# PHP is a general purpose server side scripting language
that is basically used for web development.
# PHP script run on web server.
# PHP is used for dynamic web page creation.
# PHP run on GUI based operating system as well as
Command based .
#PHP can easily embedded with HTML.
#Its freely available.
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Why PHP?
It’s fast
 It’s free
 It’s easy to use
 It’s versatile
 It’s secure
 It’s customizable
Interact with HTML forms
 Communicate with databases
 Generate secure Web pages
Easy to learn and implement.
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Supported Databases
dBASE
 Informix
 Ingres
 Microsoft SQL Server
 mSQL
 MySQL
 Oracle
 PostgreSQL
 Sybase
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Basic Syntax
<html>
<head>
<title>First Script of PHP</title>
</head>
<body>
<?php
echo “Welcome to the php word!";
echo “www.ptutorial.com”;
?>
</body>
</html>
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Commenting in PHP
• PHP supports two type of commenting
1. Single line comment
<?php
echo “Comment in php"; // Single line Comment
#this also a single line comment
echo “www.ptutorial.com";
?>
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Commenting continued in PHP
2. Multi line Comment
<?php
echo “Comment in php“;
echo “Multiple line comment";
/* this multi line comment
You can put any number of line */
echo “www.ptutorial.com";
?>
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Echo Statement
• In PHP echo statement is used for deliver the string as well as variable
value on the browse, Following example explain the concept of echo
statement.
<?php
echo “Welcome to the php word!";
$number=38;
echo $number;
$str=“www.ptutorial.com”;
Echo $str;
?>
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The Semicolon and Case Sensitivity
Every statement must be terminated with semicolon.
In PHP functions, classes, core language keywords are case-
insensitive.
<?php
echo “Welcome to the php word!";
Echo “www.ptutorial.com”; //case insensitive
?>
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PHP Variables
Variables are just identifier that are used for storing data, like integer,
float, strings, arrays.
In PHP there is no need to declare before use.
Dollar sign is used at the time of making variable.
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Rules of making PHP variable
It must be starts with dollar($) sign.
A valid variable name start with string or underscore after
dollar sign.
PHP variable can any length.
PHP variables are case sensitive.
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Example of valid variable
$name=52;
$name_1=12;
$var145af=102;
$_php=586;
$a145=“java”;
$first_name_1=4875;
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Example of PHP Variable
<?php
$txt=“www.ptutorial.com!";
$Number=152;
$a=18.5;
Echo $number . $a;
?>
http://www.ptutorial.com 14

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PHP tutorial | ptutorial

1. Introduction of PHP By Umar Farooque Khan http://www.ptutorial.com

3. What is PHP? • PHP stand for hypertext pre-processor. # PHP is a general purpose server side scripting language that is basically used for web development. # PHP script run on web server. # PHP is used for dynamic web page creation. # PHP run on GUI based operating system as well as Command based . #PHP can easily embedded with HTML. #Its freely available. http://www.ptutorial.com 3

4. Why PHP? It’s fast  It’s free  It’s easy to use  It’s versatile  It’s secure  It’s customizable Interact with HTML forms  Communicate with databases  Generate secure Web pages Easy to learn and implement. http://www.ptutorial.com 4

5. Supported Databases dBASE  Informix  Ingres  Microsoft SQL Server  mSQL  MySQL  Oracle  PostgreSQL  Sybase http://www.ptutorial.com 5

6. Basic Syntax <html> <head> <title>First Script of PHP</title> </head> <body> <?php echo “Welcome to the php word!"; echo “www.ptutorial.com”; ?> </body> </html> http://www.ptutorial.com 6

7. Commenting in PHP • PHP supports two type of commenting 1. Single line comment <?php echo “Comment in php"; // Single line Comment #this also a single line comment echo “www.ptutorial.com"; ?> http://www.ptutorial.com 7

8. Commenting continued in PHP 2. Multi line Comment <?php echo “Comment in php“; echo “Multiple line comment"; /* this multi line comment You can put any number of line */ echo “www.ptutorial.com"; ?> http://www.ptutorial.com 8

9. Echo Statement • In PHP echo statement is used for deliver the string as well as variable value on the browse, Following example explain the concept of echo statement. <?php echo “Welcome to the php word!"; $number=38; echo $number; $str=“www.ptutorial.com”; Echo $str; ?> http://www.ptutorial.com 9

10. The Semicolon and Case Sensitivity Every statement must be terminated with semicolon. In PHP functions, classes, core language keywords are case- insensitive. <?php echo “Welcome to the php word!"; Echo “www.ptutorial.com”; //case insensitive ?> http://www.ptutorial.com 10

11. PHP Variables Variables are just identifier that are used for storing data, like integer, float, strings, arrays. In PHP there is no need to declare before use. Dollar sign is used at the time of making variable. http://www.ptutorial.com 11

12. Rules of making PHP variable It must be starts with dollar($) sign. A valid variable name start with string or underscore after dollar sign. PHP variable can any length. PHP variables are case sensitive. http://www.ptutorial.com 12

13. Example of valid variable $name=52; $name_1=12; $var145af=102; $_php=586; $a145=“java”; $first_name_1=4875; http://www.ptutorial.com 13

14. Example of PHP Variable <?php $txt=“www.ptutorial.com!"; $Number=152; $a=18.5; Echo $number . $a; ?> http://www.ptutorial.com 14

PHP tutorial | ptutorial

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