Is php.ini upload_max_filesize combined?

Use post_max_size to set the total and upload_max_filesize for max per file.

Check: https://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize

• upload_max_filesize int - The maximum size of an uploaded file. When an int is used, the value is measured in bytes. Shorthand notation, as described in this FAQ, may also be used.

And https://www.php.net/manual/en/ini.core.php#ini.post-max-size

• post_max_size int - Sets max size of post data allowed. This setting also affects file upload. To upload large files, this value must be larger than upload_max_filesize. Generally speaking, memory_limit should be larger than post_max_size. When an int is used, the value is measured in bytes. Shorthand notation, as described in this FAQ, may also be used. If the size of post data is greater than post_max_size, the $_POST and $_FILES superglobals are empty. This can be tracked in various ways, e.g. by passing the $_GET variable to the script processing the data, i.e. <form action="edit.php?processed=1">, and then checking if $_GET['processed'] is set.