Warning: Trying to access array offset on value of type bool in /home/celcit/public_html/cursos-y-talleres/docente.php on line 15

Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 in /home/celcit/public_html/cursos-y-talleres/docente.php:16 Stack trace: #0 /home/celcit/public_html/cursos-y-talleres/docente.php(16): mysqli->query('select concat_w...') #1 {main} thrown in /home/celcit/public_html/cursos-y-talleres/docente.php on line 16