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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 7.2 or later
2. PDO, pdo_mysql, curl (version 7.10.5 or later), openssl (version 1.1.1a or later), gmp, imap, json, ldap, libxml, mailparse, iconv, mbstring, mcrypt (PHP <7.2), simplexml, soap, and zlib PHP extensions
3. MariaDB version 10.2 or later with max_allowed_packet = 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