--TEST-- Test array_intersect_uassoc() function : usage variation - Passing class/object methods to callback --FILE-- "green", "c" => "blue", "red"); $array2 = array("a" => "green", "yellow", "red"); // define some class with method class MyClass { static function static_compare_func($a, $b) { return strcasecmp($a, $b); } public function class_compare_func($a, $b) { return strcasecmp($a, $b); } } echo "\n-- Testing array_intersect_uassoc() function using class with static method as callback --\n"; var_dump( array_intersect_uassoc($array1, $array2, array('MyClass','static_compare_func')) ); var_dump( array_intersect_uassoc($array1, $array2, 'MyClass::static_compare_func')); echo "\n-- Testing array_intersect_uassoc() function using class with regular method as callback --\n"; $obj = new MyClass(); var_dump( array_intersect_uassoc($array1, $array2, array($obj,'class_compare_func')) ); ?> ===DONE=== --EXPECTF-- *** Testing array_intersect_uassoc() : usage variation *** -- Testing array_intersect_uassoc() function using class with static method as callback -- array(1) { ["a"]=> string(5) "green" } array(1) { ["a"]=> string(5) "green" } -- Testing array_intersect_uassoc() function using class with regular method as callback -- array(1) { ["a"]=> string(5) "green" } ===DONE===