A PHP Error was encountered

Severity: Notice

Message: Undefined offset: -1

Filename: helpers/display_text_helper.php

Line Number: 126

Backtrace:

File: C:\xampp\htdocs\journal_rsujet\application\helpers\display_text_helper.php
Line: 126
Function: _error_handler

File: C:\xampp\htdocs\journal_rsujet\application\views\main\article.php
Line: 4
Function: authors_to_str

File: C:\xampp\htdocs\journal_rsujet\application\libraries\Template.php
Line: 351
Function: view

File: C:\xampp\htdocs\journal_rsujet\application\controllers\Main.php
Line: 80
Function: write_view

File: C:\xampp\htdocs\journal_rsujet\index.php
Line: 315
Function: require_once