CODEWITHSUNDEEP
phplinuxweboperating-system
Aviv Cohn
Aviv Cohn

Reputation: 17243

Is flock() reliable on Linux?

I'm looking for a way to lock a file so no more than one request can read, write or delete it at a time. I hear flock() is meant for that. However I'm running on Linux, and I've read that flock() is 'advisory' on Linux.

So my question to you: can I count on flock() to reliably lock my files with PHP running over Apache on Linux? Or should I look for a different approach?

Upvotes: 2

Views: 370

Answers (1)

Neil Masson
Neil Masson

Reputation: 2689

Advisory means that processes can ignore the flock if they want to. If you are in control of the file and consistently use flock, you are fine. If the file can be manipulated by other processes, then you may have a problem.

Upvotes: 4

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