What's New In PHP 5.3: Volume One (IPC2009SE 2009-05-27)

Part one of the joint presentation with Johannes Schlüter on PHP 5.3, given at International PHP Conference Spring Edition in Berlin, Germany.

Transcript

1. What’s New in PHP 5.3
2. Johannes Schlüter
5. David Zülke
8. PHP Awesomeness History 0 25.000.000.000 50.000.000.000 75.000.000.000 100.000.000.000 PHP/FI PHP 3 PHP 4 PHP 5 PHP 5.1 PHP 5.2 PHP 5.3 PHP 6 1 10.000 100.000 1.000.000 1.500.000 2.000.000 75.000.000.000 100.000.000.000 Woot Level
9. PHP Awesomeness History, on a logarithmic scale 1 562 316.228 177.827.941 100.000.000.000 PHP/FI PHP 3 PHP 4 PHP 5 PHP 5.1 PHP 5.2 PHP 5.3 PHP 6 1 10.000 100.000 1.000.000 1.500.000 2.000.000 75.000.000.000 100.000.000.000 Woot Level
10. Volume One Namespaces Closures, Part One Late Static Binding Operators, Syntax, Magic Methods & Constants New & Removed Extensions, BC Windows Support Volume Two PHAR Closures, Part Two SPL Stream Changes Date and Time Handling ext/mysqlnd ext/intl getopt, OpenSSL, php.ini Performance/Internals/GC
11. What’s New in PHP 5.3 Volume One
12. Name\Spaces Because Underscores Are Not Enough
13. Namespaceable Elements namespace Foo; const ANSWER = 42; class C { /* ... */ } function f() { } echo Foo\ANSWER; new Foo\C(); Foo\f();
14. Multiple Namespaces namespace Foo { class C { /* ... */ } } namespace Bar { class C { /* ... */ } }
15. Namespaces Example #1 MyFramework/someModule/Foo.class.php: <?php namespace MyFramework\someModule; class Foo { /* ... */ } ?> app/Bar.class.php: <?php class Bar extends MyFramework\someModule\Foo { /* ... */ } ?>
16. Namespaces Example #2 MyFramework/someModule/Foo.class.php: <?php namespace MyFramework\someModule; class Foo { /* ... */ } ?> MyFramework/someModule/Bar.class.php: <?php namespace MyFramework\someModule; class Bar extends Foo { /* ... */ } ?>
17. Namespaces: call_user_func // it's a string, so we need to use a FQN call_user_func_array( array( __NAMESPACE__.'\some_class', 'method' ), $params );
18. Class Resolution namespace MyFramework\someModule; class PdoException { } new PdoException(); // MyFramework\myModule new \PdoException(); // ext/pdo new DateTime(); // class not found! new \DateTime(); // works
19. Function Resolution namespace MyFramework\someModule; function strlen($param) { return 0; } echo strlen("hello world"); // 0 echo \strlen("hello world"); // 11 echo some\other\space\strlen("hello world");
20. Using Namespaces foo/bar.php: <?php namespace foo\bar; class class1 {} // foo\bar\class1 ?> some/code.php: <?php use foo\bar; new bar\class1(); ?>
21. Aliasing foo/bar.php: <?php namespace foo\bar; class class1 {} // foo\bar\class1 ?> some/code.php: <?php use foo\bar as baz; use foo\bar\class1 as zomg; new baz\class2(); new zomg(); ?>
22. Closures Chapter One: The Basics
23. Closures: Very Basic $array = array(3, 9, 2); array_filter( $array, function($element) { return $element > 5; } );
24. Late Static Binding ohai, I’m in ur base, calling teh selfz
25. The ActiveRecord example $user = User::findByID(23); echo "Hello " . $user‐>getName() . "!\n"; $user‐>setPassword("verysecret"); $user‐>save();
26. Implementation (w/ Injection) abstract class ActiveRecord { static function findById($id) { $table= get_called_class(); $query = "SELECT * FROM " . $table . " WHERE id=" . $id; /* .... */ } } class User extends ActiveRecord {} class Entry extends ActiveRecord {} $a = User::findById(2); $b = Entry::findById(4);
27. self vs static with LSB class Base { public static function m() { self::printName(); static::printName(); } static function printName() { echo __CLASS__; } } Base::m(); Base Base
28. self vs static with LSB Base Extended class Extended extends Base { static function printName() { echo __CLASS__; } }
29. Operators, Syntax, Magic Methods & Constants And Exceptions That Eat Each Other
30. __callStatic() class Foo { public static function __callStatic($name, $args) { echo $name; } } Foo::boats(); boats
31. Static Calls w/ $classname $cls = 'DateTime'; $cls::getLastErrors();
32. Constants in Global Scope const EGG = 'bacon';
33. NOWDOC echo <<<'BAI' Price: $US 375 BAI; Price: $US 375
34. HEREDOC echo <<<"BAI" Price: $US 375 BAI; Notice: Undefined variable: US...
35. __DIR__ // old: function call, conditional include include(dirname(__FILE__) . '/brother.php'); // new: magic constant, no conditional include include(__DIR__ . '/brother.php');
36. Exception Linking try { $pdoStatement‐>execute(); } catch(PDOException $e) { $up = new RuntimeException('PDO fell over', 0, $e); throw $up; // lame joke, ain't it? }
37. Ifsetor $id = $_GET["id"] ?: 0;
38. Notice: Undefined index: id
39. goto label: durr; $i++; if($i < 100) { goto durr; }
40. New/Removed Extensions And Backwards Compatibility Changes
41. New Extensions intl sqlite3 mysqlnd phar fileinfo enchant
42. Removed Extensions msql dbase fbsql fdf ncurses ming sybase (-> sybase_ct) Deprecated: ereg
43. Potential BC breaks New Keywords: namespace goto New global identifiers: New extensions New Closure class zend.ze1_comptibility_mode Parameter parsing: objects not interpreted as arrays anymore by these funcs: current, next, key, each, reset, end natsort, natcasesort, usort, uasort, uksort array_flip, array_unique
44. call_user_func_array w/ refs function foo(&$param) {} // breaks call_user_func_array("foo", array(23)); // breaks call_user_func_array("foo", array($var)); // works call_user_func_array("foo", array(&$var));
45. E_DEPRECATED New error level to indicated deprecated stuff scheduled for removal in later releases Part of E_ALL which is good :) E_USER_DEPRECATED for userland errors Should be used for deprecated stuff, so E_STRICT can be used for the intended “bad practice” purpose
46. Windows Much improved
47. Bugfixes Some of which are really, really important
48. - Fixed bug #47757 (rename JPG to JPEG in phpinfo). (Pierre)
49. Thank You And Goodbye! Johannes Schlüter (johannes@php.net) http://twitter.com/phperror David Zülke (david.zuelke@bitextender.com) http://twitter.com/dzuelke