A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 109
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 110
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

疑難雜症萬事通 - 電位單位 - 前往 https://ref.ncl.edu.tw/學科專家諮詢平台/問題選粹-blog/293-電場與電位的定義？
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您即將離開本站

並前往 https://ref.ncl.edu.tw/%E5%AD%B8%E7%A7%91%E5%B0%88%E5%AE%B6%E8%AB%AE%E8%A9%A2%E5%B9%B3%E5%8F%B0/%E5%95%8F%E9%A1%8C%E9%81%B8%E7%B2%B9-blog/293-%E9%9B%BB%E5%A0%B4%E8%88%87%E9%9B%BB%E4%BD%8D%E7%9A%84%E5%AE%9A%E7%BE%A9%EF%BC%9F

是否確定要離開？