Note: On our new platform, custom PHP settings need to be declared in a file called .user.ini, not php.ini. If you have a php.ini file, you will need to rename it to .user.ini in order for it to work.
Most of the variables in the .user.ini file can be overwritten to allow you to customise the PHP environment for your hosting. You can do this by creating a .user.ini file and uploading to the directory you want to use this in. There are no special permissions needed to create this file and you won't need a full copy of the existing file, you can simply enter the directives/parameters you want to change.
To make sure this takes effect, ensure that your file is named .user.ini (.ini being the file extension) and then add your directives in the following format:
variable_name = variable_value ;
Using this method you can update settings such as the maximum filesize to upload, maximum execution time for script etc.
This file will take effect from the location this is uploaded to, for this to update the settings for your entire site upload to the level above the public_html folder.