Calling multiple arguments in an array from a function [PHP]

Question

I am trying to call multiple arguments from a function in php using an array.

Class useful {
    function callFunctionFromClass($className, $function, $args = array()) {
            return $className::$function($args);
     }
}

<?php
    require("library/class.php");

    $u = new useful;

    $u::callFunctionFromClass(new useful, "text", "Test", "Test");
?>

I have the function text() created aswell like so:

function text($msg, $msg2) {
    echo $msg;
    echo $msg2;
}

I am getting this error message:

Warning: Missing argument 2 for useful::text(), 
  called in htdocs\class\library\class.php on line 16 
  and defined in htdocs\class\library\class.php on line 11
Test
Notice: Undefined variable: msg2 in htdocs\class\library\class.php on line 13

This works fine without $msg2 & a second argument. So how is multiple arguments pulled off?

You are calling a non-static class as a static class $u::callFunctionFromClass(new useful, "text", "Test", "Test"); that should be reporting an error also — RiggsFolly
– RiggsFolly, Commented Jul 30, 2015 at 13:50

Mihai Matei · Accepted Answer · 2015-07-30 13:51:48Z

3

you must use call_user_func_array. Also you are calling callFunctionFromClass as a static method but it isn't static

Class useful
{
    public function callFunctionFromClass($className, $function, $args = array())
    {
        return call_user_func_array(array($className, $function), $args);
    }

    public function text($msg, $msg2)
    {
        echo $msg;
        echo $msg2;
    }
}

$u = new useful;

$test = $u->callFunctionFromClass('useful', "text", array("Test", "Test"));

edited Jul 30, 2015 at 13:51

answered Jul 30, 2015 at 13:47

Mihai Matei

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2 Comments

ZyDevs Over a year ago

Fixed it, just got rid of var_dump() and used it like I was earlier, Thanks!

Mihai Matei Over a year ago

that's because the method text is not returning anything.. you must use return inside the text method in order to have something returned

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