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

When renaming multiple files in PHP, it is important to consider potential pitfalls such as file conflicts, permission issues, and error handling. To avoid these pitfalls, you can use functions like `rename()` to safely rename files, check for file existence before renaming, and handle errors properly to ensure a smooth renaming process. 

$directory = '/path/to/directory/';
$files = scandir($directory);

foreach($files as $file){
    if($file != '.' && $file != '..'){
        $newName = 'new_' . $file;
        
        if(file_exists($directory . $newName)){
            echo 'File already exists: ' . $newName . '<br>';
        } else {
            if(rename($directory . $file, $directory . $newName)){
                echo 'File renamed successfully: ' . $file . ' to ' . $newName . '<br>';
            } else {
                echo 'Error renaming file: ' . $file . '<br>';
            }
        }
    }
}

Keywords

file renaming PHP file system error handling batch processing

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