<?php $arr = [['11-01-2012', 1], ['01-01-2014', 2], ['01-01-2015', 3], ['09-02-2013', 4], ['01-01-2013', 5]]; function date_sort($a, $b) { return strtotime($a[0]) - strtotime($b[0]); } usort($arr, "date_sort"); print_r($arr);
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