Wordpress
Wordpress is an application from the default repository. Documentation can be found here
Custom php
To modify php settings go to /home/wordpress1/.config/state/config/uploads.ini and adjust your settings, your modifications are included inside the backup
memory_limit=512M upload_max_filesize=256M post_max_size =256M max_execution_time=600 max_input_time=600 max_file_uploads=50