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A PHP Error was encountered

Severity: 8192

Message: strlen(): Passing null to parameter #1 ($string) of type string is deprecated

Filename: client/category.php

Line Number: 34

Backtrace:

File: /home/wonderclub/application/views/client/category.php
Line: 34
Function: _error_handler

File: /home/wonderclub/application/core/MY_Controller.php
Line: 92
Function: view

File: /home/wonderclub/application/controllers/Client.php
Line: 141
Function: render

File: /home/wonderclub/application/core/MY_Controller.php
Line: 63
Function: category

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