note 92579 deleted from function.array-diff-assoc by thiago

Note Submitter: php dot notes at dwarven dot co dot uk ---- A quick update to array_compare from 55 dot php at imars dot com, deals with array keys existing but containing null, which otherwise fools the isset() function. I replaced with array_key_exists(): <?php // dwarven Differences: // * Replaced isset() with array_key_exists() to account for keys with null contents // Previously by 55 dot php at imars dot com // Key differences: // * Removed redundant test; // * Returns false bool on exact match (not zero integer); // * Use type-precise comparison "!==" instead of loose "!="; // * Detect when $array2 contains extraneous elements; // * Returns "before" and "after" instead of only "before" arrays on mismatch. function array_compare($array1, $array2) { $diff = false; // Left-to-right foreach ($array1 as $key => $value) { if (!array_key_exists($key,$array2)) { $diff[0][$key] = $value; } elseif (is_array($value)) { if (!is_array($array2[$key])) { $diff[0][$key] = $value; $diff[1][$key] = $array2[$key]; } else { $new = array_compare($value, $array2[$key]); if ($new !== false) { if (isset($new[0])) $diff[0][$key] = $new[0]; if (isset($new[1])) $diff[1][$key] = $new[1]; }; }; } elseif ($array2[$key] !== $value) { $diff[0][$key] = $value; $diff[1][$key] = $array2[$key]; }; }; // Right-to-left foreach ($array2 as $key => $value) { if (!array_key_exists($key,$array1)) { $diff[1][$key] = $value; }; // No direct comparsion because matching keys were compared in the // left-to-right loop earlier, recursively. }; return $diff; }; ?>