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Gutenberg で生成されてしまう空の <p></p> タグを the_content() 読み込み時に削除する方法

WordPressの Gutenberg エディターでは、新規ブロックが自動生成されて、空の <p></p> が保存されてしまうことがよくある。

この問題には、functions.php などに次のコードを追記することで対処できる。

// the_content 用フィルター.
add_filter(
    'the_content',
    function ( $content ) {
        $content = str_replace( '<p></p>', '', $content );
        return $content;
    }
);

これで、the_content() で、<p></p> が削除された状態の記事本文が読み込まれるようになる。

なお、get_the_content() は、フィルターが適応されていない状態の記事を取得するので、要注意。

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