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PHPの予約語

PHPの予約語

PHP で定義済みの ID の一覧を示します。
ここに示す ID はいずれも、 別途明記されていない限りは
スクリプトの中で ID として使用することはできません。
これらの一覧には キーワード、定義済みの変数、定数、クラス名が含まれています。
これらの一覧は、 全てを網羅しているわけではありません。

PHP公式リファレンス

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