wincache_unlock

(PECL wincache >= 1.1.0)

wincache_unlock — Releases an exclusive lock on a given key

说明

wincache_unlock ( string $key ) : bool

Releases an exclusive lock that was obtained on a given key by using wincache_lock(). If any other process was blocked waiting for the lock on this key, that process will be able to obtain the lock.

Warning

Using of the wincache_lock() and wincache_unlock() can cause deadlocks when executing PHP scripts in a multi-process environment like FastCGI. Do not use these functions unless you are absolutely sure you need to use them. For the majority of the operations on the user cache it is not necessary to use these functions.

参数

key

Name of the key in the cache to release the lock on.

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE。

范例

Example #1 Using wincache_unlock()

<?php
$fp = fopen("/tmp/lock.txt", "r+");
if (wincache_lock(“lock_txt_lock”)) { // do an exclusive lock
    ftruncate($fp, 0); // truncate file
    fwrite($fp, "Write something here\n");
    wincache_unlock(“lock_txt_lock”); // release the lock
} else {
    echo "Couldn't get the lock!";
}
fclose($fp);
?>

参见

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