A PHP Error was encountered

Severity: Notice

Message: Undefined variable: alerte

Filename: views/header_site.php

Line Number: 56

Backtrace:

File: /home/hdvm3abcweb/public_html/application/views/header_site.php
Line: 56
Function: _error_handler

File: /home/hdvm3abcweb/public_html/application/controllers/Liste_des_ventes.php
Line: 38
Function: view

File: /home/hdvm3abcweb/public_html/index.php
Line: 315
Function: require_once