--TEST-- file_put_contents() and invalid parameters --FILE-- <?php class foo { function __toString() { return __METHOD__; } } $file = dirname(__FILE__)."/file_put_contents.txt"; $context = stream_context_create(); var_dump(file_put_contents($file, $context)); var_dump(file_put_contents($file, new stdClass)); var_dump(file_put_contents($file, new foo)); $fp = fopen($file, "r"); var_dump(file_put_contents($file, "string", 0, $fp)); @unlink($file); echo "Done\n"; ?> --EXPECTF-- Warning: file_put_contents(): supplied resource is not a valid stream resource in %s on line %d bool(false) bool(false) int(15) Warning: file_put_contents(): supplied resource is not a valid Stream-Context resource in %s on line %d int(6) Done