ReflectionFunction::invokeArgs

(PHP 5 >= 5.1.0, PHP 7)

ReflectionFunction::invokeArgs — Invokes function args

说明

public mixed ReflectionFunction::invokeArgs ( array $args )

Invokes the function and pass its arguments as array.

参数

args

The passed arguments to the function as an array, much like call_user_func_array() works.

返回值

Returns the result of the invoked function

范例

Example #1 ReflectionFunction::invokeArgs() example

<?php
function title($title, $name)
{
    return sprintf("%s. %s\r\n", $title, $name);
}

$function = new ReflectionFunction('title');

echo $function->invokeArgs(array('Dr', 'Phil'));
?>

以上例程会输出：

Dr. Phil

Example #2 ReflectionFunction::invokeArgs() with references example

<?php
function get_false_conditions(array $conditions, array &$false_conditions)
{
    foreach ($conditions as $condition) {
        if (!$condition) {
            $false_conditions[] = $condition;
        }
    }
}

$function_ref     = new ReflectionFunction('get_false_conditions');

$conditions       = array(true, false, -1, 0, 1);
$false_conditions = array();

$function_ref->invokeArgs(array($conditions, &$false_conditions));

var_dump($false_conditions);
?>

以上例程会输出：

array(2) {
  [0]=>
  bool(false)
  [1]=>
  int(0)
}

注释

Note:

如果函数有参数需为引用，那么它们必须以引用方式传入。

参见

User Contributed Notes

Andrea Giammarchi 17-Feb-2008 03:41
I encountered a weird problem with ReflectionFunction, described in ticket 44139 of PHP Bugs.

If for some reason you need to call with invoke, or invokeArgs, a function like array_unshift (that accepts internally the array by reference) you could use this code to avoid the generated warning or fatal error.

<?php
function unshift(){
    $ref        = new ReflectionFunction('array_unshift');
    $arguments    = func_get_args();
    return        $ref->invokeArgs(array_merge(array(&$this->arr), $arguments));
}
?>

I don't know about performances (you can create an array manually too, starting from array(&$this->something) and adding arguments). However, it seems to work correctly without problems, at least until the send by reference will be usable with one single value ...