PHP v5.3马上就要release了，这里让我们看看他有一些什么样的新特性。
1）_callStatic() magic 方法
class Foo { public static function __callStatic( $name, $args ) { echo "Called method $name statically"; }
public function \_\_call( $name, $args )
{
echo "Called method $name";
}
}
Foo::dog(); // outputs "Called method dog statically" $foo = new Foo; $foo->dog(); // outputs "Called method dog"
2）动态调用函数
class Dog { public function bark() { echo "Woof!"; } ‹span style="color: #333399;"›}
$class = "Dog" $action = "bark"; $x = new $class(); // instantiates the class "Dog" $x->$action(); // outputs "Woof!" ‹/span›
3) 标准PHP库（SPL）
加了了少数几个容器类，比如，栈（SplStack）和固定数组（SplFixedArray）
$stack = new SplStack();
// push a few new items on the stack $stack->push("a"); $stack->push("b"); $stack->push("c");
// see how many items are on the stack echo count($stack); // returns 3
// iterate over the items in the stack foreach ( $stack as $item ) echo "[$item],"; // the above outputs: [c][/c]
[/c],[b],[a] // pop an item off the stack echo $stack->pop(); // returns "c" // now see how many items are on the stack echo count($stack); // returns 2
4) Closures 功能
关于Closures，这是一个把函数定义成变量的玩意。让我们看几个例子：
示例一：
$string = "Hello World!"; $closure = function() use ($string) { echo $string; };
$closure();
Output:
Hello World!
示例二 使用引用的变量
$x = 1 $closure = function() use (&$x) { ++$x; }
echo $x . "\\n"; $closure(); echo $x . "\\n"; $closure(); echo $x . "\\n";
Output:
1
2
3
示例三，返回值
function getAppender($baseString) { return function($appendString) use ($baseString) { return $baseString .$appendString; }; }
示例四，Reflection
class Counter { private $x;
public function \_\_construct()
{
$this->x = 0;
}
public function increment()
{
$this->x++;
}
public function currentValue()
{
echo $this->x . "\\\\n";
}
} $class = new ReflectionClass("Counter"); $method = $class->getMethod("currentValue"); $closure = $method->getClosure() $closure(); $class->increment(); $closure();
Output:
0
1
示例五，Reflection API
$closure = function ($x, $y = 1) {}; $m = new ReflectionMethod($closure); Reflection::export ($m); ‹strong›Output‹/strong›: Method [ public method __invoke ] {
示例六，Uses Case
$logdb = function ($string) { Logger::log("debug","database",$string);}; $db = mysqli_connect("server","user","pass"); $logdb("Connected to database"); $db->query("insert into parts (part, description) values ("Hammer","Pounds nails"); $logdb("Insert Hammer into to parts table"); $db->query("insert into parts (part, description) values ("Drill","Puts holes in wood"); $logdb("Insert Drill into to parts table"); $db->query("insert into parts (part, description) values ("Saw","Cuts wood"); $logdb("Insert Saw into to parts table");
更为详细的文章，请参考这里，链接。
5) 使用namespace
新版的PHP会开始支持C++式的namespace，请参看示例：
示例一
/* Foo.php */ <?php namespace Foo; function bar() { echo "calling bar...."; } ?>
/* File1.php */ <?php include "./Foo.php"; Foo/bar(); // outputs "calling bar...."; ?>
/* File2.php */ <?php include "./Foo.php"; use Foo as ns; ns/bar(); // outputs "calling bar...."; ?>
/* File3.php */ <?php include "./Foo.php"; use Foo; bar(); // outputs "calling bar...."; ?> ‹!--p include "./Foo.php"; use Foo; bar(); // outputs "calling bar....";--›
示例二，多重namespace
‹!--p namespace Foo; class Test {} namespace Bar; class Test {} $a = new Foo\\Test; $b = new Bar\\Test; var_dump($a, $b);--› <?php namespace Foo; class Test {}
namespace Bar; class Test {}
$a = new Foo\\Test; $b = new Bar\\Test;
var_dump($a, $b);
Output: object(Foo\\Test)#1 (0) { } object(Bar\\Test)#2 (0) { } ‹strong›Output:‹/strong› object(Foo\\Test)#1 (0) { } object(Bar\\Test)#2 (0) { }
示例三，不同文件中的namespace
/*定义*/ /* global.php */ <?php function hello() { echo "hello from the global scope!"; } ?>
/* Foo.php */ <?php namespace Foo; function hello() { echo "hello from the Foo namespace!"; } ?>
/* Foo_Bar.php */ <?php namespace Foo/Bar; function hello() { echo "hello from the Foo/Bar namespace!"; } ?> ‹!--p namespace Foo/Bar; function hello() { echo "hello from the Foo/Bar namespace!"; }--›
/*使用 */ ‹!--p include "./global.php"; include "./Foo.php"; include "./Foo_Bar.php"; use Foo; hello(); // outputs "hello from the Foo namespace!" Bar\\hello(); // outputs "hello from the Foo/Bar namespace!" \\hello(); // outputs "hello from the global scope!"--›<?php include "./global.php"; include "./Foo.php"; include "./Foo_Bar.php";
use Foo;
hello(); // outputs "hello from the Foo namespace!" Bar\\hello(); // outputs "hello from the Foo/Bar namespace!" \\hello(); // outputs "hello from the global scope!" ?>
更为详细的文章，请参考这里，链接。
6)开始支持Achieve包
正像JAR一样，PHP也要开始支持自己的Achieve包了，叫作，Phar。PHP提供了一整套函数来帮助开发人员创建和使用Phar，正如下面的示例所示：
创建：
$p = new Phar("/path/to/my.phar", CURRENT_AS_FILEINFO | KEY_AS_FILENAME, "my.phar"); $p->startBuffering();
创建文件存根（stub）
$p->setStub("‹!--p Phar::mapPhar(); include "phar://myphar.phar/index.php"; __HALT_COMPILER();--›");
加入文件：
$p["file.txt"] = "This is a text file"; $p["index.php"] = file_get_contents("index.php"); $p["big.txt"] = "This is a big text file"; $p["big.txt"]->setCompressedBZIP2(); //加入某目录下所有的文件 $p->buildFromDirectory("/path/to/files","./\\.php$/");
使用Phar
include "myphar.phar"; include "phar://myphar.phar/file.php";
更为详细的文章，请参考这里，链接。