Re: [PHP-DEV] Performance question about create_function

[Mathieu Suen]

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.s...@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

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-- Mathieu Suen
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