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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

台鐵車站情報站 - 空間向量內積公式 - 前往 http://moodle.fg.tp.edu.tw/~tfgcoocs/blog/wp-content/uploads/2016/03/70空間向量─空間向量內積介紹.pdf
台鐵車站情報站
台灣鐵路發展超過百年，有完整的環島路線，每個車站都成為當地發展的重要指標，火車站周圍有什麼特別的，看看網紅們怎麼說

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