- strcmp: documentation ( source)
- usort: documentation ( source)
<?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]);
};
}
usort($abc, build_sorter('ln'));
foreach ($abc as $item) {
echo $item['fn'] . ', ' . $item['ln'] . "\n";
}