In order to get your WordPress website running fast and without errors, you need to optimize your server settings. You can always customize your PHP settings through the command line or WHM. The Custom PHP Settings WordPress Plugin has you covered when you don’t have access to those tools. It can modify your .htaccess or .user.ini file depending on whether PHP is running as an Apache module or in FastCGI mode. This plugin is also compatible with Nginx but you need to make some minor modifications to your server configuration.
This plugin can be used to change max execution time, memory limit, upload_max_filesize, and other common PHP settings. The pro version of this plugin has even more features. It lets you enable error logging, backup your configuration, and set environment variables in your .htaccess file.