Warning: Undefined variable $con in /var/www/esl-teachers.com/public_html/view.php on line 158

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /var/www/esl-teachers.com/public_html/view.php:158 Stack trace: #0 /var/www/esl-teachers.com/public_html/view.php(158): mysqli_query() #1 {main} thrown in /var/www/esl-teachers.com/public_html/view.php on line 158