Are there any limitations or restrictions when it comes to mass uploading files with PHP?

When mass uploading files with PHP, there may be limitations on the server-side regarding file size, memory usage, and execution time. To avoid these restrictions, you can adjust the PHP configuration settings such as `upload_max_filesize`, `post_max_size`, `max_execution_time`, and `memory_limit` in the php.ini file or programmatically using `ini_set()` function.

// Adjust PHP configuration settings for mass file uploads
ini_set('upload_max_filesize', '20M');
ini_set('post_max_size', '25M');
ini_set('max_execution_time', 300);
ini_set('memory_limit', '128M');