note 88596 added to function.array-intersect

Given a multidimensional array that represents AND/OR relationships (example below), you can use a recursive function with array_intersect() to see if another array matches that set of relationships. For example: array( array( 'red' ), array( 'white', 'blue' ) ) represents "red OR ( white AND blue )". array( 'red', array( 'white', 'blue' ) ) would work, too, BTW. If I have array( 'red' ) and I want to see if it matches the AND/OR array, I use the following function. It returns the matched array, but can just return a boolean if that's all you need: $needle = array( array( 'red' ), array( 'white', 'blue' ) ); $haystack = array( 'red' ); function findMatchingArray( $needle, $haystack ) { foreach( $needle as $element ) { $test_element = (array) $element; if( count( $test_element ) == count( array_intersect( $test_element, $haystack ) ) ) { return $element; } } return false; } Pretty tough to describe what I needed it to do, but it worked. I don't know if anyone else out there needs something like this, but hope this helps. ---- Server IP: 64.71.164.2 Probable Submitter: 209.114.137.18 ---- Manual Page -- http://www.php.net/manual/en/function.array-intersect.php Edit -- https://master.php.net/note/edit/88596 Del: integrated -- https://master.php.net/note/delete/88596/integrated Del: useless -- https://master.php.net/note/delete/88596/useless Del: bad code -- https://master.php.net/note/delete/88596/bad+code Del: spam -- https://master.php.net/note/delete/88596/spam Del: non-english -- https://master.php.net/note/delete/88596/non-english Del: in docs -- https://master.php.net/note/delete/88596/in+docs Del: other reasons-- https://master.php.net/note/delete/88596 Reject -- https://master.php.net/note/reject/88596 Search -- https://master.php.net/manage/user-notes.php