What are some best practices for implementing locking mechanisms in PHP to prevent conflicting updates by different users?

Conflicting updates by different users can be prevented by implementing locking mechanisms in PHP. One common approach is to use database locks to ensure that only one user can update a specific record at a time, preventing conflicts and data inconsistencies. 

// Acquire a lock on the database record before updating
$recordId = 123;
$lock = "UPDATE records SET locked = 1 WHERE id = $recordId";

// Check if the lock was successfully acquired
if ($lock) {
    // Perform the update operation
    $update = "UPDATE records SET data = 'new data' WHERE id = $recordId";
    
    // Release the lock after the update is complete
    $release = "UPDATE records SET locked = 0 WHERE id = $recordId";
}

Keywords

locking mechanisms concurrency control transactions database isolation levels optimistic locking

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