Online PHP editor | output for 8d4ca

<?php $abc = array( 'rec_1' => array('fn'=>'Aron','ln'=>'Michaels'), 'rec_2' => array('fn'=>'Abbey','ln'=>'Drake'), 'rec_3' => array('fn'=>'Alice','ln'=>'Peterson')); /*function build_sorter($key) { return function ($a, $b) use ($key) { return strcmp($a[$key], $b[$key]); }; }*/ function sortit($a, $b , $key) { return strcmp($a[$key], $b[$key]); }; function mysort($key) { return sortit($a,$b,$key); } //usort($abc, build_sorter('ln')); usort($abc, mysort('ln'); foreach ($abc as $item) { echo strtoupper($item['ln']) . ', ' . $item['fn'] . "\n"; }