How to test if fLock function is working

[AshleyQuick]

I believe the syntax is correct but how would I test to see if the txt file is indeed being locked and unlocked after being written to?

$fp = fopen($settings['idfile'],"wb") or die("Can't open the id file ($settings[idfile]) for reading!");
flock( $fp, LOCK_EX );
fputs($fp,$previd);
flock( $fp, LOCK_UN );
fclose($fp);

[halojoy]

if you goto PHP manual [man]flock[/man]
and scroll down in comments,
I think you will find where posters describe their way of testing.
It is not so dead-simple to test if flock() works.
One might even sometimes have to use 2 different browsers.

Here is one way to test in the flock() comments:
dranger at export dash japan dot com
06-Mar-2006 06:45
http://php.net/manual/en/function.flock.php#62638

🙂