Online PHP editor | output for p8jA9

<?php var_dump(filter_var('17', FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY)); var_dump(filter_var(['17'], FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY)); var_dump(filter_var('foo', FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY)); var_dump(filter_var(['foo'], FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY)); echo "\n----\n\n"; var_dump(filter_var('17', FILTER_VALIDATE_INT, FILTER_FORCE_ARRAY)); var_dump(filter_var(['17'], FILTER_VALIDATE_INT, FILTER_FORCE_ARRAY)); var_dump(filter_var('foo', FILTER_VALIDATE_INT, FILTER_FORCE_ARRAY)); var_dump(filter_var(['foo'], FILTER_VALIDATE_INT, FILTER_FORCE_ARRAY)); echo "\n----\n\n"; var_dump(filter_var('17', FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY|FILTER_FORCE_ARRAY)); var_dump(filter_var(['17'], FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY|FILTER_FORCE_ARRAY)); var_dump(filter_var('foo', FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY|FILTER_FORCE_ARRAY)); var_dump(filter_var(['foo'], FILTER_VALIDATE_INT, FILTER_REQUIRE_ARRAY|FILTER_FORCE_ARRAY));