--TEST-- Test is_subclass_of() function : usage variations - unexpected type for arg 1 with valid class in arg 2. --FILE-- 'red', 'item' => 'pen'), // null data NULL, null, // boolean data true, false, TRUE, FALSE, // empty data "", '', // string data "string", 'String', // undefined data $undefined_var, // unset data $unset_var, ); // loop through each element of the array for object foreach($values as $value) { echo "\nArg value $value \n"; var_dump( is_subclass_of($value, $class_name) ); }; echo "Done"; ?> --EXPECTF-- *** Testing is_subclass_of() : usage variations *** Error: 8 - Undefined variable: undefined_var, %s(69) Error: 8 - Undefined variable: unset_var, %s(72) Arg value 0 bool(false) Arg value 1 bool(false) Arg value 12345 bool(false) Arg value -2345 bool(false) Arg value 10.5 bool(false) Arg value -10.5 bool(false) Arg value 101234567000 bool(false) Arg value 1.07654321E-9 bool(false) Arg value 0.5 bool(false) Error: 8 - Array to string conversion, %sis_subclass_of_variation_004.php(%d) Arg value Array bool(false) Error: 8 - Array to string conversion, %sis_subclass_of_variation_004.php(%d) Arg value Array bool(false) Error: 8 - Array to string conversion, %sis_subclass_of_variation_004.php(%d) Arg value Array bool(false) Error: 8 - Array to string conversion, %sis_subclass_of_variation_004.php(%d) Arg value Array bool(false) Error: 8 - Array to string conversion, %sis_subclass_of_variation_004.php(%d) Arg value Array bool(false) Arg value bool(false) Arg value bool(false) Arg value 1 bool(false) Arg value bool(false) Arg value 1 bool(false) Arg value bool(false) Arg value bool(false) Arg value bool(false) Arg value string In __autoload(string) bool(false) Arg value String In __autoload(String) bool(false) Arg value bool(false) Arg value bool(false) Done