Online PHP editor | refs for QnUXc

<?php $a1 = array('55','something1','something2','something3' ); $a2 = array('77','something14','something25','something36' ); $a4 = array('66.6','something15','something25','something34' ); $array = [$a1, $a2, $a4]; usort($array, function($a, $b) { if ($a[0] > $b[0]) { return 1; } else { return -1; } }); print_r($array);