What are some common issues with file uploads in PHP, especially when using HTML5?

One common issue with file uploads in PHP, especially when using HTML5, is the maximum file size limit set in the PHP configuration file (php.ini). To solve this issue, you can increase the `upload_max_filesize` and `post_max_size` values in the php.ini file to allow larger file uploads.

// Increase maximum file size limit in php.ini
ini_set('upload_max_filesize', '10M');
ini_set('post_max_size', '10M');