phpflockexample

Locking Files with flock() The fopen() function, when called on a file, does not stop that same file from being opened by another script.

2011年3月27日 — I tried 100 concurrent users (100 calls to the PHP script at the same time) and it works. However, it doesn't use flock but mkdir: while (!@ ...

Examples of flock. Info and examples on flock PHP Function.

2010年9月15日 — flock() allows you to perform a simple reader/writer model which can be used on virtually every platform (including most Unix derivatives ...

2020年6月24日 — The flock() function locks or releases a file. The function returns TRUE on success and FALSE on failure.

2013年3月8日 — I'm with Danack's comment - the php documentation of flock() contains a very good example: $fp = fopen(/tmp/lock.txt, r+); if (flock($fp ...

The flock() function takes a file handle as its first parameter, and a lock operation as its second parameter. File handles you know already, and the operations ...

LOCK_EX - An exclusive lock (writer). Prevent other processes from accessing the file; LOCK_UN - Release the lock; LOCK_NB - Avoid blocking other processes ...

若设置为1 或true，则当进行锁定时阻挡其他进程。 说明. flock() 操作的file 必须是一个已经打开的文件指针。 lock 参数可以是以下值之一：.

Locks or unlocks the file in the same portable way as flock(). ... Returns true on success or false on failure. Examples ¶. Example #1 SplFileObject::flock() ...