Warning: Undefined array key "id_usuario" in /var/www/html/inc/navbar.php on line 131

Fatal error: Uncaught PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 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 /var/www/html/inc/navbar.php:136 Stack trace: #0 /var/www/html/inc/navbar.php(136): PDO->query() #1 /var/www/html/app/etiquetas/pix.php(162): include('...') #2 {main} thrown in /var/www/html/inc/navbar.php on line 136