Question

I have this array in PHP:

foreach($rss_items as $item) :
    $contenu[] = array (
        "auteur" => $author,
        "date" => $item->get_date(),
        "contenu" => $item->get_content()
    );

At the end, my array is composed of 6 parts, which everyone contains the 3 variable above.
My question is: How can I sort the array by date and using the strtotime because it’s easier to sort with this function.

strtotime($item->get_date());

Answer 1

Use usort to sort based on your own callback function.

usort($contenu, function($a, $b){
    $aSort = strtotime($a['date']);
    $bSort = strtotime($b['date']);

    if($aSort === $bSort) return 0;
    return ($aSort < $bSort) ? -1 : 1;
});

NOTE: This will only work in PHP 5.3+. If you have 5.2 or lower, you can use create_function.

usort($contenu, create_function('$a, $b','
    $aSort = strtotime($a["date"]);
    $bSort = strtotime($b["date"]);

    if($aSort === $bSort) return 0;
    return ($aSort < $bSort) ? -1 : 1;
'));