Gallery3 requires mysql and msgpack: php_value[extension]=mysql.so php_value[msgpack]=mysql.so or extension=mysql.so extension=msgpack.so See https://adrhc.go.ro/wordpress/configure-command-for-building-various-software/ for learning how to compile msgpack. The user/group of the php processes (specified in php-fpm.conf) show be the same for gallery3 directory: chown -R nobody:nobody ~/apache-htdocs/gallery3 After installing gallery3, the login page won't show because a php-fpm core dump: you must first clear the browser cache. See https://adrhc.go.ro/wordpress/core-dump/ for learning how to analyze php-fpm's core dump. When visiting dashboard menu you are asked to remove server info; do it in order to access the dashboard. Configuration: admin_area_timeout = 999999 thumb_size = 150 page_size = 42 In table graphics_rules for gallery_graphics::resize set width = 150 and height = 150. Rescan album for images: - switch to default theme (Gallery Wind) - go to Gallery page - menu: Add -> Server add Some themes insert large BLOB in DB so you need more than 3M for redo logs in mysql: innodb_log_file_size = 10M Gallery3 menus: https://adrhc.go.ro/gallery3/index.php/admin/themes https://adrhc.go.ro/gallery3/index.php/admin/theme_options https://adrhc.go.ro/gallery3/index.php/admin/advanced_settings