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Warning: Undefined variable $riga in C:\xampp\htdocs\OrariBus\dettaglio_corsa.php on line 23

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Warning: Undefined variable $riga in C:\xampp\htdocs\OrariBus\dettaglio_corsa.php on line 24

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Warning: Undefined variable $riga in C:\xampp\htdocs\OrariBus\dettaglio_corsa.php on line 25

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Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '<div style="color:white;background:red;">Errore: selezionare corsa</div> ORDER B' at line 1 in C:\xampp\htdocs\OrariBus\sql_corse_attuali.php:9 Stack trace: #0 C:\xampp\htdocs\OrariBus\sql_corse_attuali.php(9): mysqli->query('SELECT ferrovie...') #1 C:\xampp\htdocs\OrariBus\dettaglio_corsa.php(45): require('C:\\xampp\\htdocs...') #2 {main} thrown in C:\xampp\htdocs\OrariBus\sql_corse_attuali.php on line 9