What potential pitfalls should be considered when renaming files in PHP?

When renaming files in PHP, potential pitfalls to consider include ensuring that the new file name is unique to avoid overwriting existing files, handling errors that may occur during the renaming process, and verifying that the file exists before attempting to rename it. 

$oldFileName = 'old_file.txt';
$newFileName = 'new_file.txt';

if (file_exists($oldFileName)) {
    if (!file_exists($newFileName)) {
        if (rename($oldFileName, $newFileName)) {
            echo 'File renamed successfully.';
        } else {
            echo 'Error renaming file.';
        }
    } else {
        echo 'A file with the new name already exists.';
    }
} else {
    echo 'File does not exist.';
}

Keywords

file handling file renaming file_exists rename error handling

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