You can check your file upload limit by checking phpinfo() and the variable: upload_max_filesize.. A tutorial via Radlinks walks through the other settings relevant to handling larger than 2MB (default) file size transfers using PHP.

The time will come in your programming and computing travels that you come across extensions you aren’t familiar with and that’s where the FILExt website comes in handy. I want to type fileext but there is no extra ‘e’ there. Check out the .php extension filext page and you’ll see it’s shared by three other programs too like the Microsoft’s Picture It! Publishing Project File format.