wordpress error log

[27-Sep-2020 19:22:20 America/New_York] PHP Fatal error:  Uncaught Error: Call to undefined function mysql_get_server_info() in /home/applesim/public_html/bramble/check_charset.php:46
Stack trace:
#0 /home/applesim/public_html/bramble/check_charset.php(14): __db_version()
#1 /home/applesim/public_html/bramble/check_charset.php(51): __has_cap()
#2 {main}
  thrown in /home/applesim/public_html/bramble/check_charset.php on line 46
[27-Sep-2020 19:22:20 America/New_York] PHP Warning:  Use of undefined constant WP_CONTENT_DIR - assumed 'WP_CONTENT_DIR' (this will throw an Error in a future version of PHP) in /home/applesim/public_html/bramble/wp-includes/load.php on line 115
[27-Sep-2020 19:22:26 America/New_York] PHP Warning:  Use of undefined constant WP_CONTENT_DIR - assumed 'WP_CONTENT_DIR' (this will throw an Error in a future version of PHP) in /home/applesim/public_html/bramble/wp-includes/load.php on line 115
[27-Sep-2020 19:22:37 America/New_York] PHP Warning:  Use of undefined constant WP_CONTENT_DIR - assumed 'WP_CONTENT_DIR' (this will throw an Error in a future version of PHP) in /home/applesim/public_html/bramble/wp-includes/load.php on line 115