A PHP Error was encountered

Severity: Notice

Message: Undefined index: id_classe

Filename: controllers/ControlCoure.php

Line Number: 204

Backtrace:

File: /home/c1106995c/public_html/prepabac/application/controllers/ControlCoure.php
Line: 204
Function: _error_handler

File: /home/c1106995c/public_html/prepabac/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/c1106995c/public_html/prepabac/application/libraries/PHPExcel/Calculation.php:3457)

Filename: core/Common.php

Line Number: 570

Backtrace:

File: /home/c1106995c/public_html/prepabac/application/models/ModelSelction.php
Line: 102
Function: query

File: /home/c1106995c/public_html/prepabac/application/controllers/ControlCoure.php
Line: 204
Function: SlectionTouCoursUneClasse

File: /home/c1106995c/public_html/prepabac/index.php
Line: 316
Function: require_once

Une erreur de la base de données s'est produite.

Error Number: 42000/1064

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 'ORDER BY cours.id_cour DESC' at line 1

SELECT * FROM cours,matiere,contenir WHERE cours.id_matiere=matiere.id_matiere AND matiere.id_matiere=contenir.id_matiere AND contenir.id_clas= ORDER BY cours.id_cour DESC

Filename: models/ModelSelction.php

Line Number: 102