PHP 5.3 – Part 1 :PHP 5.3 – Part 1 Introduction to PHP 5.3 A Sydney PHP Group Presentation 4th September 2008 By Timothy Chandler


So what’s the big deal!? :So what’s the big deal!? PHP 5.3 = PHP 6 - Unicode + MORE! Tomorrow’s PHP Today. Forwards Compatibility.


So what’s new? :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.


Important Changes & Gotchas :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


Important Changes & Gotchas :Important Changes & Gotchas Backwards Compatibility Magic Methods All magic methods must now be declared as “public”. “static” declarations are no longer allowed. “__toString()” will no longer accept any parameters.


Important Changes & Gotchas :Important Changes & Gotchas Backwards Compatibility New Reserved Words “namespace” “goto” New Reserved Classes “Closure”


Important Changes & Gotchas :Important Changes & Gotchas Backwards Compatibility Depreciations Ticks This includes “register_tick_function()” Undepreciations “is_a()”


Important Changes & Gotchas :Important Changes & Gotchas Backwards Compatibility Windows Any Windows OS prior to Windows 2000 is no longer supported.


Important Changes & Gotchas :Important Changes & Gotchas Extensions Removed ncurses fpdf sybase dbase fbsql Added Phar Internationalization (Intl) File Information (Fileinfo) SQLite3


Important Changes & Gotchas :Important Changes & Gotchas Extensions Not allowed to disable. PCRE Reflections SPL


Important Changes & Gotchas :Important Changes & Gotchas The PHP INI File More powerful ini. A whole slew of changes which may or may not affect you.


New Syntax :New Syntax NOWDOC It’s like HEREDOC, but it doesn’t evaluate it’s contents. Syntax: NOWDOC; “NOWDOC”, like “HEREDOC”, can be replaced with any non-reserved word.


New Syntax :New Syntax Ternary Operator 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'; $bar=false; $bar?:print '$bar is False';


New Syntax :New Syntax Unset Casting 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;


New Syntax :New Syntax goto 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;


New Functions & Methods :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


New Functions & Methods :New Functions & Methods Array Functions “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.


New Functions & Methods :New Functions & Methods Date Functions “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.


New Functions & Methods :New Functions & Methods PHP Core “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.


Coming Up :Coming Up October Part 2 – New PHP Internals Lambda Functions and Closures Namespaces – maybe? November Part 3 – New PHP Extensions Internationalization Phar