Warning: Undefined array key "id_equipo" in /volume1/web/puertodealgeciras/laligaon/usuario/mensajes.php on line 7

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 'AND estado='No Leido'' at line 1 in /volume1/web/puertodealgeciras/laligaon/db/mysql.php:20
Stack trace:
#0 /volume1/web/puertodealgeciras/laligaon/db/mysql.php(20): mysqli->query('SELECT count(*)...')
#1 /volume1/web/puertodealgeciras/laligaon/usuario/mensajes.php(11): doquery('SELECT count(*)...', 'mensajes')
#2 {main}
  thrown in /volume1/web/puertodealgeciras/laligaon/db/mysql.php on line 20