note 94467 deleted from function.array-intersect-key by danbrown

Note Submitter: Anonymous ---- Here's a variation on array_intersect_key() that intersects the first (master) array's keys with the values of other arrays. It can also be used to intersect an array with an arbitrary list of keys (à la compact(), but using a source array instead of current variables): <?php function array_intersect_keylist(array $source) { $final = $source; // Loop through all arguments passed foreach(func_get_args() as $cx=> $keylist) if ($cx) { if (!is_array($keylist)) $keylist = Array((string)$keylist); // Intersect $final = array_intersect_key($final, array_fill_keys($keylist, '')); } return $final; } // Example usage $test = Array('foo' => 'something', 'bar' => 'whatever'); // Returns Array('foo' => 'something') array_intersect_keylist($test, Array('foo', 'baz') ); // Also returns Array('foo' => 'something') array_intersect_keylist($test, 'foo', 'baz'); // Equivalent to... array_intersect_key($test, Array('foo' => '', 'baz' => '')); ?>