php中使用call:

<?php

// An example callback function

function my_callback_function() {

echo "hello world!";

}

// An example callback method

class MyClass {

static function myCallbackMethod() {

echo "Hello World!";

}

}

// Type 1: Simple callback

call_user_func("my_callback_function");

// Type 2: Static class method call

call_user_func(array("MyClass", "myCallbackMethod"));

// Type 3: Object method call

$obj = new MyClass();

call_user_func(array($obj, "myCallbackMethod"));

// Type 4: Static class method call (As of PHP 5.2.3)

call_user_func("MyClass::myCallbackMethod");

// Type 5: Relative static class method call (As of PHP 5.3.0)

class A {

public static function who() {

echo "A\n";

}

}

class B extends A {

public static function who() {

echo "B\n";

}

}

call_user_func(array("B", "parent::who")); // A

?>