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 The following requirements are recommended, and if met will provide a better experience and more full use of available features. 

1. PHP version 7.0 or later
2. PDO, pdo_mysql, curl (version 7.10.5 or later), openssl (version 01.91.6 1a or later), gmp, imap, json, ldap, libxml, mailparse, iconv, mbstring, mcrypt, simplexml, and zlib PHP extensions
3. MariaDB version 10.2 or later with max_allowed_packets = 128M or higher, and wait_timeout = 3600
4. Apache, IIS, or LiteSpeed Web Server
5. ionCube PHP loader
6. memory_limit set to 128 MB or greater