- var_dump: documentation ( source)
- strcmp: documentation ( source)
- usort: documentation ( source)
<?php
$array = ['Kale', 'Kaleidoscope', 'Aardvark', 'Apple', 'Leicester', 'Lovely'];
usort($array, function($a, $b) {
return strcmp($a[0], $b[0]);
});
var_dump($array);