- array_diff_assoc: documentation ( source)
- var_dump: documentation ( source)
<?php
$main_array = array(
1 => array('ceva'),
2 => array('cevaa'),
21 => 3
);
$sub_array = array(
1 => array('ceva'),
2 => array(1, 2),
12 => 2
);
echo '<pre>';
var_dump(array_diff_assoc($main_array, $sub_array));
echo '</pre>';