--TEST-- Test array_diff() function : usage variations - unexpected values for 'arr1' argument --FILE-- <?php /* Prototype : array array_diff(array $arr1, array $arr2 [, array ...]) * Description: Returns the entries of $arr1 that have values which are not * present in any of the others arguments. * Source code: ext/standard/array.c */ /* * Test array_diff by passing non array values in place of $arr1 */ echo "*** Testing array_diff() : usage variations ***\n"; $array = array(1, 2, 3); //get an unset variable $unset_var = 10; unset ($unset_var); // get a class class classA { public function __toString() { return "Class A object"; } } // heredoc string $heredoc = <<<EOT hello world EOT; // get a resource variable $fp = fopen(__FILE__, "r"); // unexpected values to be passed to $input argument $inputs = array( // int data /*1*/ 0, 1, 12345, -2345, // float data /*5*/ 10.5, -10.5, 12.3456789000e10, 12.3456789000E-10, .5, // null data /*10*/ NULL, null, // boolean data /*12*/ true, false, TRUE, FALSE, // empty data /*16*/ "", '', // string data /*18*/ "string", 'string', $heredoc, // binary data /*21*/ b"binary", (binary)"binary", // object data /*23*/ new classA(), // undefined data /*24*/ @$undefined_var, // unset data /*25*/ @$unset_var, // resource variable /*26*/ $fp ); // loop through each element of $inputs to check the behavior of array_diff $iterator = 1; foreach($inputs as $input) { echo "\n-- Iteration $iterator --"; var_dump( array_diff($input, $array)); $iterator++; }; fclose($fp); echo "Done"; ?> --EXPECTF-- *** Testing array_diff() : usage variations *** -- Iteration 1 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 2 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 3 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 4 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 5 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 6 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 7 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 8 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 9 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 10 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 11 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 12 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 13 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 14 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 15 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 16 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 17 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 18 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 19 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 20 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 21 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 22 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 23 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 24 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 25 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL -- Iteration 26 -- Warning: array_diff(): Argument #1 is not an array in %s on line %d NULL Done