A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: controllers/Acheter.php

Line Number: 55

Backtrace:

File: /home/zpaosvx/www/application/controllers/Acheter.php
Line: 55
Function: _error_handler

File: /home/zpaosvx/www/application/controllers/Acheter.php
Line: 92
Function: liste

File: /home/zpaosvx/www/index.php
Line: 315
Function: require_once