PHP5中文手册·Call a user function given by the first parameter -- 追寻梦想＞编程乐园＞PHP 编程

说明

mixed call_user_func ( callback $function [, mixed $parameter [, mixed $... ]] )

Call a user defined function given by the function parameter.

参数

function: The function to be called. Class methods may also be invoked statically using this function by passing array($classname, $methodname) to this parameter.
parameter: Zero or more parameters to be passed to the function.

Note: Note that the parameters for call_user_func() are not passed by reference.

<?php function increment(&$var) { $var++; } $a = 0; call_user_func('increment', $a); echo $a; // 0 call_user_func_array('increment', array(&$a)); // You can use this instead echo $a; // 1 ?>

返回值

Returns the function result, or FALSE on error.

范例

Example#1 call_user_func() example


<?php
function barber($type)
{
    echo "You wanted a $type haircut, no problem";
}
call_user_func('barber', "mushroom");
call_user_func('barber', "shave");
?>

Example#2 Using a class method


<?php
class myclass {
    function say_hello()
    {
        echo "Hello!\n";
    }
}

$classname = "myclass";

call_user_func(array($classname, 'say_hello'));
?>


	PHP5中文手册 call_user_func_array create_function Function handling PHP Manual call_user_func (PHP 4, PHP 5) call_user_func — Call a user function given by the first parameter 说明 mixed call_user_func ( callback `$function` [, mixed `$parameter` [, mixed `$...` ]] ) Call a user defined function given by the `function` parameter. 参数 `function` The function to be called. Class methods may also be invoked statically using this function by passing array($classname, $methodname) to this parameter. `parameter` Zero or more parameters to be passed to the function. Note: Note that the parameters for call_user_func() are not passed by reference. `<?php function increment(&$var) { $var++; } $a = 0; call_user_func('increment', $a); echo $a; // 0 call_user_func_array('increment', array(&$a)); // You can use this instead echo $a; // 1 ?>` 返回值 Returns the function result, or `FALSE` on error. 范例 Example#1 call_user_func() example `<?php function barber($type) { echo "You wanted a $type haircut, no problem"; } call_user_func('barber', "mushroom"); call_user_func('barber', "shave"); ?>` Example#2 Using a class method `<?php class myclass { function say_hello() { echo "Hello!\n"; } } $classname = "myclass"; call_user_func(array($classname, 'say_hello')); ?>` 参见 call_user_func_array() is_callable() 有关 callback 类型的信息 call_user_func_array create_function Function handling PHP Manual

call_user_func

说明

参数

返回值

范例

参见