What are some potential pitfalls when trying to rename the first 99 files in a directory using PHP?

One potential pitfall when renaming the first 99 files in a directory using PHP is not checking if the files exist before attempting to rename them. This can lead to errors if the files do not exist or if there are fewer than 99 files in the directory. To solve this, you can use functions like `file_exists()` to check if the files exist before renaming them.

$directory = '/path/to/directory/';
$files = glob($directory . '*', GLOB_MARK);

for ($i = 0; $i < 99 && $i < count($files); $i++) {
    $file = $files[$i];
    
    if (file_exists($file)) {
        $newName = 'new_name_' . $i . '.txt';
        rename($file, $directory . $newName);
        echo "File $file renamed to $newName <br>";
    } else {
        echo "File $file does not exist <br>";
    }
}