3v4l.org

run code in 300+ PHP versions simultaneously

sponsor
bughunt
search
recent
about

@ 2014-07-23T16:28:55Z

<?php
$fo = fopen('lock.txt', 'r+'); 
if (flock($fo, LOCK_EX)) 
{
    // File was not locked, You have locked it successfully right now, do your logic 
    flock($fo, LOCK_UN); // unlock file afer script logic
} 
else
{ 
    // File is locked right now, don't run script
}

Output
Performance
VLD
References
Branches

flock: documentation ( source)
fopen: documentation ( source)

preferences:dark modelive preview

38.26 ms | 402 KiB | 5 Q