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投稿からカテゴリー名を取得する方法

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wordpressの投稿データからカテゴリー名を取得する方法です

    <?php $cat = get_the_category(); echo $cat[0]->name; ?>

get_the_category関数は投稿に紐づくカテゴリを配列で取得するため、名前を取得する場合は添字を指定してやる必要があります。
配列にはカテゴリーの情報がオブジェクトとして格納されていて、カテゴリ名は「name」で取得する事ができます。
その他メンバ変数については下記に詳しく詳解されています。

http://wpdocs.sourceforge.jp/%E3%83%86%E3%83%B3%E3%83%97%E3%83%AC%E3%83%BC%E3%83%88%E3%82%BF%E3%82%B0/get_the_category

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