- var_dump: documentation ( source)
- array_walk: documentation ( source)
<?php
$test_cases = array(
/* 0 */ array( 'A' , 'B' , 'C' ),
/* 1 */ array( 'A' , 'C' , 'B' ),
/* 2 */ array( 'B' , 'A' , 'C' ),
/* 3 */ array( 'B' , 'C' , 'A' ),
);
array_walk($test_cases, 'sort');
var_dump($test_cases);