--TEST-- Test is_subclass_of() function : usage variations - unexpected type for arg 2 --FILE-- 'red', 'item' => 'pen'), // null data NULL, null, // boolean data true, false, TRUE, FALSE, // empty data "", '', // object data new stdclass(), // undefined data $undefined_var, // unset data $unset_var, ); // loop through each element of the array for class_name foreach($values as $value) { echo "\nArg value $value \n"; var_dump( is_subclass_of($object, $value) ); }; echo "Done"; ?> --EXPECTF-- *** Testing is_subclass_of() : usage variations *** Error: 8 - Undefined variable: undefined_var, %s(67) Error: 8 - Undefined variable: unset_var, %s(70) 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_002.php(%d) Arg value Array Error: 2 - is_subclass_of() expects parameter 2 to be string, array given, %s(%d) NULL Error: 8 - Array to string conversion, %sis_subclass_of_variation_002.php(%d) Arg value Array Error: 2 - is_subclass_of() expects parameter 2 to be string, array given, %s(%d) NULL Error: 8 - Array to string conversion, %sis_subclass_of_variation_002.php(%d) Arg value Array Error: 2 - is_subclass_of() expects parameter 2 to be string, array given, %s(%d) NULL Error: 8 - Array to string conversion, %sis_subclass_of_variation_002.php(%d) Arg value Array Error: 2 - is_subclass_of() expects parameter 2 to be string, array given, %s(%d) NULL Error: 8 - Array to string conversion, %sis_subclass_of_variation_002.php(%d) Arg value Array Error: 2 - is_subclass_of() expects parameter 2 to be string, array given, %s(%d) NULL 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) Error: 4096 - Object of class stdClass could not be converted to string, %s(%d) Arg value Error: 2 - is_subclass_of() expects parameter 2 to be string, object given, %s(%d) NULL Arg value bool(false) Arg value bool(false) Done