(PECL sync >= 1.0.0)
SyncMutex::lock — Waits for an exclusive lock
public SyncMutex::lock ([ int $wait = -1 ] ) : bool
Obtains an exclusive lock on a SyncMutex object. If the lock is already acquired, then this increments an internal counter.
wait
The number of milliseconds to wait for the exclusive lock. A value of -1 is infinite.
A boolean of TRUE if the lock was obtained, FALSE otherwise.
Example #1 SyncMutex::lock() example
<?php $mutex = new SyncMutex("UniqueName"); if (!$mutex->lock(3000)) { echo "Unable to lock mutex."; exit(); } /* ... */ $mutex->unlock(); ?>
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/syncmutex.lock.php