To prevent multiple users from modifying a file simultaneously, you need to use the file_lock() function.

Name: To prevent multiple users from modifying a file simultaneously, you need to use the file_lock() function.
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Quizplus · Accepted Answer

To prevent multiple users from modifying a file simultaneously, you typically use file locking mechanisms such as `flock()` in PHP, not `file_lock()`, which does not exist as a standard function.

To Prevent Multiple Users from Modifying a File Simultaneously, You