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Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, bool given in /var/www/vhosts/riminicamper.it/httpdocs/inc/class/db.php on line 32

Fatal error: Uncaught Error: Call to a member function fetch_array() on bool in /var/www/vhosts/riminicamper.it/httpdocs/inc/class/db.php:16 Stack trace: #0 /var/www/vhosts/riminicamper.it/httpdocs/inc/modello13.inc.php(120): Db_class->fetch_array(false) #1 /var/www/vhosts/riminicamper.it/httpdocs/index.php(315): include('/var/www/vhosts...') #2 {main} thrown in /var/www/vhosts/riminicamper.it/httpdocs/inc/class/db.php on line 16