Re: Performance question about create_function

Yes that the same but only for PHP <= 5.3. I am more asking about performance. Michael Stillwell a écrit :

On Mon, Oct 19, 2009 at 1:13 PM, Mathieu Suen <mathieu.suen@easyflirt.com> wrote:

Looking at the way array_map is working, it could worth to use create_function for object. For example if I got a list of object: $callback = create_function($element, 'return $selement->getId();'); $ids = array_map($callback, $someInstances); But I don't know if it's cost a lot in performance instead of the ugly verbose way: $ids = array(); foreach($someInstances) {

       $ids[] = $someInstances->getId();

}

I think what you want to do can be done with anonymous functions:

    $arr1 = array(
        (object) array("id" => 56),
        (object) array("id" => 42)
    );

    $ids = array_map(function($obj) { return $obj->id; }, $arr1);

    print_r($ids);

produces:

    Array
    (
        [0] => 56
        [1] => 42
    )

Michael

-- -- Mathieu Suen --