(PECL sync >= 1.0.0)
SyncMutex::lock — Waits for an exclusive lock
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.
Example #1 SyncMutex::lock() example
<?php$mutex = new SyncMutex("UniqueName");if (!$mutex->lock(3000)){ echo "Unable to lock mutex."; exit();}/* ... */$mutex->unlock();?>