A PHP Error was encountered

Severity: 8192

Message: Required parameter $id follows optional parameter $post_categories

Filename: public/M_posts.php

Line Number: 162

Backtrace:

File: /home/mtsnege1/public_html/application/controllers/public/Readmore.php
Line: 26
Function: model

File: /home/mtsnege1/public_html/index.php
Line: 315
Function: require_once