array_diff_recursive2

<?php
/**
Откриване на разликите според двата масива, а не само според първия
*/

$arr1 = array(
        'key1' => 2,
        'key2' => 4,
        'key3' => array(1, 2,
                        array(1,4,3,5,
                              array(10, 13, 20)),
                        7),
        'key4' => 1,
);

$arr2 = array(
        'key1' => 2,
        'key2' => 5,
        'key3' => array(1, 2,
                        array(1,34,3,5,
                              array(10, 15, 20)),
                        7),

);

function array_diff_recursive($a1, $a2) {
    $result = array();
    $loopArray = (sizeof($a1) >= sizeof($a2)) ? $a1 : $a2;
    $len = sizeof($loopArray);

    $quit = false;
    for ( $i = 0; $i < $len; $i++ ) {
        $oppositeArray = ($loopArray === $a1) ? $a2 : $a1;
        $oppositeArrayKeys = array_keys($oppositeArray);
        $loopArrayKeys = array_keys($loopArray);

        if ( array_key_exists($loopArrayKeys[$i], $oppositeArray) ) {
            if ( is_array($loopArray[$loopArrayKeys[$i]]) && is_array($oppositeArray[$loopArrayKeys[$i]]) ) {
                $result[$loopArrayKeys[$i]] = array_diff_recursive($loopArray[$loopArrayKeys[$i]], $oppositeArray[$loopArrayKeys[$i]]);
            }
            else {
                if ( $loopArray[$loopArrayKeys[$i]] !== $oppositeArray[$loopArrayKeys[$i]] ) {
                    $result[$loopArrayKeys[$i]] = $loopArray[$loopArrayKeys[$i]];
                }
            }
        } else {
            $result[$loopArrayKeys[$i]] = $loopArray[$loopArrayKeys[$i]];
        }

        if ( $i == ($len-1) && !$quit ) {
            $temp = $oppositeArray;
            $oppositeArray = $loopArray;
            $loopArray = $temp;
            $i = 0;
            $quit = true;
            $len = sizeof($loopArray);
        }
    }

    return $result;
}

$multi_diff = array_diff_recursive($arr1, $arr2);

// Tests
echo "<pre>";
echo "Array 1:\n";
print_r($arr1);
echo "\n\nArray 2:\n";
print_r($arr2);
echo "\n\nMulti diff:\n";
print_r($multi_diff);
echo "</pre>";
?>