Web Interface Fatal Error

[funnyzocker]

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /var/www/html/hawkeye/config.php:64 Stack trace: #0 /var/www/html/hawkeye/index.php(10): include() #1 {main} thrown in /var/www/html/hawkeye/config.php on line 64

PHP Version 7.0.30-1~dotdeb+8.1 Hawkeye Version 1.6.0

in the php version 5.6 the webinterface is working, but its not providing any solutions, the search is initiated, but it never ends