A PHP Error was encountered

Severity: 8192

Message: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated

Filename: controllers/Cat.php

Line Number: 529

Backtrace:

File: /home/aln3esa1/public_html/abdelmohsen.com/application/controllers/Cat.php
Line: 529
Function: preg_match

File: /home/aln3esa1/public_html/abdelmohsen.com/application/controllers/Cat.php
Line: 84
Function: blockat

File: /home/aln3esa1/public_html/abdelmohsen.com/index.php
Line: 329
Function: require_once