[PHP] 'flock' function in PHP not working

I am just wondering, is anyone here familiar with the flock function in PHP? A customer here is claiming the script is working on all servers except mine, it times out, like there is some infinite loop. I tested it on another of our cPanel servers, same problem.

The manual says:

On some operating systems flock() is implemented at the process level. When using a multithreaded server API like ISAPI you may not be able to rely on flock() to protect files against other PHP scripts running in parallel threads of the same server instance!

Anyone know more about this? Thanks.

 

 

 

 

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