php sort multidimension array by field

sort_by_field.php

<?php
function msort(&$data, $field, $order='asc') {
   return usort($data, function($a, $b) use ($field, $order) {
	   return $order==='asc' ? $a[$field] < $b[$field] : $a[$field] > $b[$field];
   });
}

//example
$data = array(array('t'=>1, 'p'=>'aBc'), array('t'=>3, 'p'=>'aBb'));
$rzt = msort($data, 't', 'asc');
var_dump($data, $rzt);