call_user_func_array — 调用回调函数，并把一个数组参数作为回调函数的参数

<?php
function foobar($arg, $arg2) {
    echo __FUNCTION__, " got $arg and $arg2
";
}
class foo {
    function bar($arg, $arg2) {
        echo __METHOD__, " got $arg and $arg2
";
    }
}

// Call the foobar() function with 2 arguments
call_user_func_array("foobar", array("one", "two"));

// Call the $foo->bar() method with 2 arguments
$foo = new foo;
call_user_func_array(array($foo, "bar"), array("three", "four"));
?>  

以上例程的输出类似于：
foobar got one and two
foo::bar got three and four