--TEST-- constant() tests --FILE-- <?php var_dump(constant()); var_dump(constant("", "")); var_dump(constant("")); var_dump(constant(array())); define("TEST_CONST", 1); var_dump(constant("TEST_CONST")); define("TEST_CONST2", "test"); var_dump(constant("TEST_CONST2")); echo "Done\n"; ?> --EXPECTF-- Warning: Wrong parameter count for constant() in %s on line %d NULL Warning: Wrong parameter count for constant() in %s on line %d NULL Warning: constant(): Couldn't find constant in %s on line %d NULL Notice: Array to string conversion in %s on line %d Warning: constant(): Couldn't find constant Array in %s on line %d NULL int(1) string(4) "test" Done