Test if file is locked

Question

In PHP, how can I test if a file has already been locked with flock? For example, if another running script has called the following:

$fp = fopen(\'thefile.t         


        

Answer 1

Check it like this:

if (!flock($file, LOCK_EX)) {
    throw new Exception(sprintf('File %s is locked', $file));
}

fwrite($file, $write_contents);