Fatal error: Uncaught TypeError: mysqli_fetch_array(): Argument #1 ($result) must be of type mysqli_result, bool given in /var/www/html/school-assistant/public/_mainp/pages/pages.php:25 Stack trace: #0 /var/www/html/school-assistant/public/_mainp/pages/pages.php(25): mysqli_fetch_array(true) #1 /var/www/html/school-assistant/public/index.php(75): fPages(NULL, 'algebra', 'umnojenie_alg_d...', '\xD0\x90\xD0\xBB\xD0\xB3\xD0\xB5\xD0\xB1\xD1\x80\xD0\xB0 ', false) #2 {main} thrown in /var/www/html/school-assistant/public/_mainp/pages/pages.php on line 25