PHP function equivalent to str_repeat but taking a callable instead.

str_repeat_func.php

function str_repeat_func($function, $multiplier) {
    if(!is_callable($function) || !is_integer($multiplier) || $multiplier <= 0)
        return "";

    $accumulator = "";
    for($i = 0; $i < $multiplier; $i++)
        $accumulator .= call_user_func($function);

    return $accumulator;
}

If you want to pass in a method, you can't pass $object->method; instead you need to pass ["className", "methodName"]. This is PHP wtfness; sorry.