(PECL sync >= 1.0.0)
SyncMutex::__construct — Constructs a new SyncMutex object
public SyncMutex::__construct ([ string $name ] )
Constructs a named or unnamed countable mutex.
name
The name of the mutex if this is a named mutex object.
Note:
If the name already exists, it must be able to be opened by the current user that the process is running as or an exception will be thrown with a meaningless error message.
The new SyncMutex object. An exception is thrown if the mutex cannot be created or opened.
Example #1 SyncMutex::__construct() named mutex with lock timeout example
<?php
$mutex = new SyncMutex("UniqueName");
if (!$mutex->lock(3000))
{
echo "Unable to lock mutex.";
exit();
}
/* ... */
$mutex->unlock();
?> Example #2 SyncMutex::__construct() unnamed mutex example
<?php $mutex = new SyncMutex(); $mutex->lock(); /* ... */ $mutex->unlock(); ?>
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https://www.php.net/manual/en/syncmutex.construct.php