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Fatal error: Uncaught TypeError: mysqli_real_escape_string(): Argument #1 ($mysql) must be of type mysqli, null given in /home/grandax/kanriyakuzaisi.com/public_html/sql/rese1.php:23 Stack trace: #0 /home/grandax/kanriyakuzaisi.com/public_html/sql/rese1.php(23): mysqli_real_escape_string(NULL, 'm1') #1 /home/grandax/kanriyakuzaisi.com/public_html/sql/rese1.php(36): convstring('m1') #2 {main} thrown in /home/grandax/kanriyakuzaisi.com/public_html/sql/rese1.php on line 23