Online PHP editor | refs for S8I7a

<?php $dataPoints = array( array('1' => '33','2' => 'dave','3' => '367'), array('1' => '168','2' => 'susan','3' => '56788'), array('1' => '99','2' => 'tim','3' => '6') ); function cmp($a, $b){ if ($a[3] == $b[3]) { return 0; } return ($a[3] < $b[3]) ? -1 : 1; } print_r($dataPoints); usort($dataPoints, "cmp"); print_r($dataPoints);