A PHP Error was encountered

Severity: Warning

Message: Undefined array key "mobile"

Filename: libraries/Moblie_library.php

Line Number: 51

Backtrace:

File: /opt/lampp/htdocs/www/xingfa/application/libraries/Moblie_library.php
Line: 51
Function: _error_handler

File: /opt/lampp/htdocs/www/xingfa/application/controllers/Join.php
Line: 101
Function: checkmobile

File: /opt/lampp/htdocs/www/xingfa/index.php
Line: 315
Function: require_once