Revision yml file

After upgrading php to a new version, flew previously made yml file. CMS – Bitrix
Here is what hosting and what you need to correct:
As we see it, Your script uses the deprecated function mysql_connect, which does not exist in php 7.x. Please contact Your developer to adapt the script to new version of php.

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /var/www/fastuser/data/www/v-gorod.com/ymt/ymt.php:17
Stack trace:
#0 {main}
thrown in /var/www/fastuser/data/www/v-gorod.com/ymt/ymt.php on line 17

Please rate the finishing touch given further updates php