note 36880 modified in function.array-diff-assoc by aidan

[jochem at iamjochem dawt com] Here is a slightly enhanced version of Micheal Johnsons function. This version accepts arguments in the same way as array_diff_assoc (i.e. you can pass as many arrays as you want - any arguments that are not arrays are ignored). If the first argument is not an array you automatically get empty array back: The point of the function is to return all values in the first array whose keys (only keys are checked!) are not present in any subsequently passed arrays. [original post] array_diff_assoc() requires that both the key and the value pairs match. To match based on keys only, try this function. <?php function array_diff_keys() { $args = func_get_args(); $res = $args[0]; if(!is_array($res)) { return array(); } for($i=1;$i<count($args);$i++) { if(!is_array($args[$i])) { continue; } foreach ($args[$i] as $key => $data) { unset($res[$key]); } } return $res; } // Example $a = array('a' => '1', 'b' => '2', 'c' => '3'); $b = array('a' => '2', 'b' => '2', 'e' => '4'); // Yields array('a' => '1', 'c' => '3') // Note that the 'a' index is not removed (as one might expect) $c = array_diff_assoc($a, $b); // Yields array('c' => '3') $d = array_diff_keys($a, $b); ?> --was-- [jochem at iamjochem dawt com] Here is a slightly enhanced version of Micheal Johnsons function. This version accepts arguments in the same way as array_diff_assoc (i.e. you can pass as many arrays as you want - any arguments that are not arrays are ignored). If the first argument is not an array you automatically get empty array back: The point of the function is to return all values in the first array whose keys (only keys are checked!) are not present in any subsequently passed arrays. [original post] array_diff_assoc() requires that both the key and the value pairs match. To match based on keys only, try this function. <?php function array_diff_keys() { $args = func_get_args(); $res = $args[0]; if(!is_array($res)) { return array(); } for($i=1;$i<count($args);$i++) { if(!is_array($args[$i])) { continue; } foreach ($args[$i] as $key => $data) { unset($res[$key]); } } return $res; } // Example $a = array('a' => '1', 'b' => '2', 'c' => '3'); $b = array('a' => '2', 'b' => '2', 'e' => '4'); // Yields array('a' => '1', 'c' => '3') // Note that the 'a' index is not removed (as one might expect) $c = array_diff_assoc($a, $b); // Yields array('c' => '3') $d = array_diff_keys($a, $b); ?> http://www.php.net/manual/en/function.array-diff-assoc.php