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PHPのnullチェック使い分け

Posted at

nullのみチェック

isset

  • nullの時だけfalse
  • 空文字、空配列はtrueになる

is_null

  • nullの時だけtrue
  • 空文字、空配列の時はfalse

全チェック

empty

  • null、空文字、空配列すべてtrueになる

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