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HOME > PHP Manual > call_user_func_array - Call a user function given with an array of parameters

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Function handling Functions

call_user_func

Function handling Functions

PHP Manual

call_user_func_array

(PHP 4 >= 4.0.4, PHP 5)

call_user_func_array — Call a user function given with an array of parameters

Description

mixed call_user_func_array ( callback $function , array $param_arr )

Call a user defined function with the parameters in param_arr .

Parameters

function: The function to be called.
param_arr: The parameters to be passed to the function, as an indexed array.

Return Values

Returns the function result, or FALSE on error.

Examples

Example #1 call_user_func_array() example


<?php
function debug($var, $val)
{
    echo "***DEBUGGING\nVARIABLE: $var\nVALUE:";
    if (is_array($val) || is_object($val) || is_resource($val)) {
        print_r($val);
    } else {
        echo "\n$val\n";
    }
    echo "***\n";
}

$c = mysql_connect();
$host = $_SERVER["SERVER_NAME"];

call_user_func_array('debug', array("host", $host));
call_user_func_array('debug', array("c", $c));
call_user_func_array('debug', array("_POST", $_POST));
?>

Example #2 call_user_func_array() using namespace name


<?php

namespace Foobar;

class Foo {
    static public function test($name) {
        print "Hello {$name}!\n";
    }
}

// As of PHP 5.3.0
call_user_func_array(__NAMESPACE__ .'::Foo::test', array('Hannes'));
// Hello Hannes!

// As of PHP 5.3.0
call_user_func_array(array(__NAMESPACE__ .'::Foo', 'test'), array('Philip'));
// Hello Philip!

?>

Notes

Note: Referenced variables in param_arr are passed to the function by a reference, others are passed by a value. In other words, it does not depend on the function signature whether the parameter is passed by a value or by a reference.

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