Fatal error: Uncaught ArgumentCountError: mysqli_real_escape_string() expects exactly 2 arguments, 1 given in /usr/home/kulfon/domains/steps4you.pl/public_html/instruktorzy.php:6
Stack trace:
#0 /usr/home/kulfon/domains/steps4you.pl/public_html/instruktorzy.php(6): mysqli_real_escape_string('jailson_de_oliv...')
#1 {main}
  thrown in /usr/home/kulfon/domains/steps4you.pl/public_html/instruktorzy.php on line 6