PHP 5.3 Part 1 - Introduction to PHP 5.3
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The document discusses new features in PHP 5.3 including new syntax, functions, extensions, and changes from previous versions. Some key changes include new array, date, and PHP core functions; the addition of namespaces, lambda functions, and closures; and removal of support for certain Windows versions and extensions. Backwards compatibility issues are addressed for magic methods, reserved words, and deprecations.
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- 1. PHP 5.3 – Part 1 Introduction to PHP 5.3 A Sydney PHP Group Presentation 4 th September 2008 By Timothy Chandler
- 2. So what’s the big deal!? PHP 5.3 = PHP 6 - Unicode + MORE! Tomorrow’s PHP Today. Forwards Compatibility.
- 3. So what’s new? New Syntax New Functions & Methods New Extensions Namespaces Lambda Functions & Closures Late Static Binding Lots of important changes A few gotchas.
- 4. Important Changes & Gotchas Functions Array functions “next()” & “current()” no longer work with objects. “ session_start()” will now return a Boolean response “false” if it fails to start a session. By default, “ clearstatcache()” will no longer clear “realpath()” cache. Backwards Compatibility
- 5. Important Changes & Gotchas Magic Methods All magic methods must now be declared as “public”. “static” declarations are no longer allowed. “ __toString()” will no longer accept any parameters. Backwards Compatibility
- 6. Important Changes & Gotchas New Reserved Words “ namespace” “ goto” New Reserved Classes “ Closure” Backwards Compatibility
- 7. Important Changes & Gotchas Depreciations Ticks This includes “register_tick_function()” Undepreciations “ is_a()” Backwards Compatibility
- 8. Important Changes & Gotchas Windows Any Windows OS prior to Windows 2000 is no longer supported. Backwards Compatibility
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- 10. Important Changes & Gotchas Not allowed to disable. PCRE Reflections SPL Extensions
- 11. Important Changes & Gotchas More powerful ini. A whole slew of changes which may or may not affect you. The PHP INI File
- 12. New Syntax It’s like HEREDOC, but it doesn’t evaluate it’s contents. Syntax: <<<‘NOWDOC’ <CONTENT> NOWDOC; “ NOWDOC”, like “HEREDOC”, can be replaced with any non-reserved word. NOWDOC
- 13. New Syntax The Ternary Operator has been given a shortcut. Testing for only “true” or “false” is now possible. Syntax: $foo=true; !$foo?:print '$foo is True<br />'; $bar=false; $bar?:print '$bar is False<br />'; Ternary Operator
- 14. New Syntax You can now cast a variable to NULL while using it and remove it from memory in one fell swoop. Syntax: $foo='foo'; $foo=(unset)print $foo; Unset Casting
- 15. New Syntax The new “goto” keyword is useful for controlling breaks in loops and switches. Not recommended outside of loops and switches. Easy to abuse – be careful with your GCP. Syntax: print 1; goto label1; print 2; print 3; label1: print 4; goto
- 16. New Functions & Methods Too many for this presentation. They include: Array Date GMP Hash Image Math Mcrypt Network PCNTL PHP Core SHM SPL Streams Strings
- 17. New Functions & Methods “ array_replace()” – Finds and replaces based on key and merges the remainder. “ array_replace_recursive()” – Recursively finds and replaces based on key and merges the remainder. Array Functions
- 18. New Functions & Methods “ date_add()” – Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object. “ date_sub()” – Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object “ date_diff()” – Takes two DateTime Objects and calculates the difference. Date Functions
- 19. New Functions & Methods “ class_alias()” – Creates an alias of a class name. “ forward_static_call()” and “forward_static_call_array()” – Related to Late Static Binding. This will be discussed in another presentation. PHP Core
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