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Categories / Php / File Directory

 

If file lock is not available, flock( ) will return immediately with false rather than wait for a lock to become available.

<?     $fp = fopen("foo.txt", "w");     if (flock($fp, LOCK_EX | LOCK_NB)) {             echo "Got lock!\n";             sleep(10);             flock($fp, LOCK_UN);     } else {             print "Could not get lock!\n";     } ?>