Pass array as argument list to function

Question

Google won't help me; I want to pass an array as an argument list to a function.

I can't edit the function itself, so I can't pass an array. It expects this:

function doSomething($arg1, $arg2, [$arg3...]) {
    //code...
}

And I have this:

$args = array('arg1', 'arg2', 'arg3'...);

How can I pass them anyway?

Halcyon · Accepted Answer · 2014-02-25T23:06:19.763

1

You can use call_user_func_array.

Use like:

$array = array(1, 2, 3);
call_user_func_array("myfunc", $array);

function myfunc($a, $b, $c) {
    var_dump($a, $b, $c); // 1 2 3
}

$array = array(2, 3);
$first = 1;
call_user_func_array("myfunc", array_merge(arary($first), $array));

function myfunc($a, $b, $c) {
    var_dump($a, $b, $c); // 1 2 3
}

In case of an object instance your callback should look like:

array($obj, "someFunc")

so:

call_user_func_array(array($obj, "someFunc"), $array);

edited Feb 25 '14 at 23:06

answered Feb 25 '14 at 22:47

Halcyon

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But how can I do this with the first arg not being in the array? – user3341388 Feb 25 '14 at 22:53
What do you mean? You can always do some `array_merge` magic to get the arguments you want. – Halcyon Feb 25 '14 at 22:56
Hmm, got it - but... "call_user_func_array() expects parameter 1 to be a valid callback, function '' not found or invalid function name" $obj->doSomething not working – user3341388 Feb 25 '14 at 23:01
See my updated answer. Callbacks on objects are slightly different. – Halcyon Feb 25 '14 at 23:06

Pass array as argument list to function

1 Answers1