- print_r: documentation ( source)
- array_values: documentation ( source)
- serialize: documentation ( source)
- array_walk: documentation ( source)
<?php
$arr = array( array(5,6), array(1,2), array(6,5) );
array_walk($arr, 'sort');
$deduped = array();
foreach ($arr as $val) {
$deduped[serialize($val)] = $val;
}
$arr = array_values($deduped);
print_r($arr);