array_map in php with callback OOP
callback, oop, php
Solution
In PHP, you can use an array to associate an object and a method call as a callable
array_map(array($this, 'id2area'), $array);
http://php.net/manual/en/language.types.callable.php
Problem
Possible Duplicate: How to use an object method as a callback function Usually I used array_map with procedural code, but in this case I'm working in OOP and the callback should be "this->id2areas", but It's not working. Is there anyway of put this callback with OOP? ``` ERROR MESSAGE: array_map() expects parameter 1 to be a valid callback, function 'this->id2area' not found or invalid function name ``` MY CODE ================================================================================= ``` $this->context->assign('user_areas', implode(', ', array_map('id2area', explode(',', $this->user['areas'])))); explode(',', $this->user['areas'])))); function id2area($id) {//callback if ($id == 0) { return 'National'; } $query = "SELECT area FROM area WHERE id = $id"; return DB::fetch_instance()->slave->fetchColumn($query); } ```