Does fwrite have built-in transaction management for multiple write operations on the same file?

fwrite does not have built-in transaction management for multiple write operations on the same file. To ensure data consistency when writing multiple times to the same file, you can implement your own transaction management using file locking mechanisms. This involves using flock() to acquire an exclusive lock before writing to the file and releasing the lock after the write operation is complete. 

$fp = fopen('data.txt', 'a+');
if (flock($fp, LOCK_EX)) {
    fwrite($fp, "First write operation\n");
    fwrite($fp, "Second write operation\n");
    flock($fp, LOCK_UN);
} else {
    echo "Could not acquire lock on file";
}
fclose($fp);

Keywords

PHP fwrite transaction management multiple write operations file.

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