- array_intersect: documentation ( source)
- array_merge: documentation ( source)
- array_diff: documentation ( source)
<?php
$a = array('a', 'a', 'b');
$b = array('a', 'b', 'b');
if (sizeof($a)==sizeof($b) AND array_diff($a,$b)==array())
{
echo 'fail' . "\n";
}
if (count(array_diff(array_merge($a, $b), array_intersect($a, $b))) === 0) {
echo 'fail2' . "\n";
}
?>