Are there any potential pitfalls to be aware of when using the copy and unlink functions in PHP to move files?

One potential pitfall when using the copy and unlink functions in PHP to move files is that if the copy operation fails for any reason, the original file may still be deleted by the unlink function, resulting in data loss. To prevent this, you should first check if the copy operation was successful before unlinking the original file.

// Copy the file
if (copy($source, $destination)) {
    // If copy successful, unlink the original file
    unlink($source);
} else {
    // Handle copy failure
    echo "Failed to copy file.";
}