Login to your cPanel control panel Type php into the search bar, and then click on select php version On this page, you can select the version of php that you want to use in the drop down menu. Below this, you can select which php modules you want to use When you have made the changes you want, click save. Click switch to php options on the right hand side. On this page, you can change settings such as the memory limit, the post max size and the upload max filesize. When you are happy with the new settings, click save.