--TEST-- Test in_array() function : usage variations - haystack as sub-array/object --FILE-- "two", "three" => 3), 4 => "four", "five" => 5, array('', 'i') ); var_dump( in_array("four", $sub_array) ); //checking for element in a sub-array var_dump( in_array(3, $sub_array[1]) ); var_dump( in_array(array('','i'), $sub_array) ); /* checking for objects in in_array() */ echo "\n*** Testing objects with in_array() ***\n"; class in_array_check { public $array_var = array(1=>"one", "two"=>2, 3=>3); public function foo() { echo "Public function\n"; } } $in_array_obj = new in_array_check(); //creating new object //error: as wrong datatype for second argument try { var_dump( in_array("array_var", $in_array_obj) ); } catch (TypeError $e) { echo $e->getMessage(), "\n"; } //error: as wrong datatype for second argument try { var_dump( in_array("foo", $in_array_obj) ); } catch (TypeError $e) { echo $e->getMessage(), "\n"; } //element found as "one" exists in array $array_var var_dump( in_array("one", $in_array_obj->array_var) ); echo "Done\n"; ?> --EXPECT-- *** Testing sub-arrays with in_array() *** bool(true) bool(true) bool(true) *** Testing objects with in_array() *** in_array(): Argument #2 ($haystack) must be of type array, in_array_check given in_array(): Argument #2 ($haystack) must be of type array, in_array_check given bool(true) Done