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【WordPress】他のブログ記事をRSSで取得する

Last updated at Posted at 2014-07-12

WordPressにRSSを取得するfetch_feedという関数があるので、これを使う。
こんな感じ

hoge.php
<?php
    include_once(ABSPATH . WPINC . '/feed.php');
    $rss_url = array(
      'RSS_url'
    );

    $rss = fetch_feed($rss_url);
    if (!is_wp_error($rss)){
      $maxitems = $rss->get_item_quantity(5);
      $rss_items = $rss->get_items(0, $maxitems);
    }

    foreach($rss_items as $key => $value){
      $first_img = '';
      if ( preg_match( '/<img.+?src=[\'"]([^\'"]+?)[\'"].*?>/msi', $value->get_content(), $matches ) ) {
        $first_img = $matches[1];
      }

      echo '
      <li style="margin-bottom: 20px;">
        <img src="'.esc_attr( $first_img ).'" width="100" height="100">
        <a href="'.$value->get_permalink().'" target="_blank">'.$value->get_title().'</a>
      </li>
      ';
    }
?>

取得件数を変えるにはget_item_quantity(5)の数字を変更する

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