How to get closest date compared to an array of dates in PHP

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I may not have the best naming conventions, but here goes.

I calculate the intervals between the array of dates and the given date. I then do a sort, to find the “smallest” difference.

$dates = array
(
    '0'=> "2013-02-18 05:14:54",
    '1'=> "2013-02-12 01:44:03",
    '2'=> "2013-02-05 16:25:07",
    '3'=> "2013-01-29 02:00:15",
    '4'=> "2013-01-27 18:33:45"
);


function find_closest($array, $date)
{
    //$count = 0;
    foreach($array as $day)
    {
        //$interval[$count] = abs(strtotime($date) - strtotime($day));
        $interval[] = abs(strtotime($date) - strtotime($day));
        //$count++;
    }

    asort($interval);
    $closest = key($interval);

    echo $array[$closest];
}

find_closest($dates, "2013-02-18 05:14:55");

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