Function for super-hard array conversion

#******************************************************************************
# This is a super-hard array conversion function.(PHP.net)
#******************************************************************************
#It only returns TRUE if the two arrays are completely identical, that means that
#they have the same keys, and the values of all keys are exactly the same (compared with ===)

function array_same($a1, $a2) {
if (!is_array($a1) || !is_array($a2))
return false;

$keys = array_merge(array_keys($a1), array_keys($a2));

foreach ($keys as $k) {
if (!isset($a2[$k]) || !isset($a1[$k]))
return false;

if (is_array($a1[$k]) || is_array($a2[$k])) {
if (!array_same($a1[$k], $a2[$k]))
return false;
}
else {
if (! ($a1[$k] === $a2[$k]))
return false;
}
}

return true;
}

#******************************************************************************