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Fatal error: Cannot redeclareのよくある原因

More than 1 year has passed since last update.

定番の原因

  • 同じ関数名を定義している
  • 2回includeしてる(2回読み込み)

見つけにくい2回include

① index.php ← A.php, B.php 

② A.php   ←   B.php

①index.phpがA.phpとB.phpをinclude
②A.phpがB.phpをinclude

コメント

極めてくだらないが、見つからなかったりする。
include文を一つずつコメントアウトして、どのファイルとどのファイルが同じ物を読み込んでいるかを検証するとすぐ気づける

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