1)_callStatic() magic 方法
classFoo { publicstaticfunction__callStatic( $name, $args) { echo"Called method $name statically"; } publicfunction__call( $name, $args) { echo"Called method $name"; } }
Foo::dog(); // outputs "Called method dog statically" $foo= newFoo; $foo->dog(); // outputs "Called method dog"
2)<span style="font-family:nsimsun">动态调用函数</span>
classDog { publicfunctionbark() { 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= newSplStack(); // push a few new items on the stack $stack->push("a"); $stack->push("b"); $stack->push("c"); // see how many items are on the stack echocount($stack); // returns 3 // iterate over the items in the stack foreach( $stackas$item) echo"[$item],"; // the above outputs: 1 [/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
functiongetAppender($baseString) { returnfunction($appendString) use($baseString) { return$baseString.$appendString; }; }
示例四,Reflection
classCounter { private$x; publicfunction__construct() { $this->x = 0; } publicfunctionincrement() { $this->x++; } publicfunctioncurrentValue() { echo$this->x . "\\n"; } } $class= newReflectionClass("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) {}; $m= newReflectionMethod($closure); Reflection::export ($m); <strong>Output</strong>: Method [ publicmethod __invoke ] { - Parameters [2] { Parameter #0 [ $x] Parameter #1 [ $y] } }
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 namespaceFoo; functionbar() { echo"calling bar...."; } ?> /* File1.php */ <?php include"./Foo.php"; Foo/bar(); // outputs "calling bar...."; ?> /* File2.php */ <?php include"./Foo.php"; useFoo asns; ns/bar(); // outputs "calling bar...."; ?> /* File3.php */ <?php include"./Foo.php"; useFoo; bar(); // outputs "calling bar...."; ?> <!--p include"./Foo.php"; useFoo; bar(); // outputs "calling bar....";-->
示例二,多重namespace
<!--p namespaceFoo; classTest {} namespaceBar; classTest {} $a= newFoo\\Test; $b= newBar\\Test; var_dump($a, $b);--> <?php namespaceFoo; classTest {} namespaceBar; classTest {} $a= newFoo\\Test; $b= newBar\\Test; var_dump($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 functionhello() { echo"hello from the global scope!"; } ?> /* Foo.php */ <?php namespaceFoo; functionhello() { echo"hello from the Foo namespace!"; } ?> /* Foo_Bar.php */ <?php namespaceFoo/Bar; functionhello() { echo"hello from the Foo/Bar namespace!"; } ?> <!--p namespaceFoo/Bar; functionhello() { echo"hello from the Foo/Bar namespace!"; }--> /*使用 */ <!--p include"./global.php"; include"./Foo.php"; include"./Foo_Bar.php"; useFoo; 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"; useFoo; 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= newPhar("/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。