WordPress で記事のツイート数を取得する

wp_get_social_counts.php

<?php
/*
 * Get Social Button Count twitter
 */
function get_social_counts( $url ){
    $transient_key = md5('get_social_counts-' . $url);

    // get cache
    if ( false === ($counts = get_transient($transient_key)) ) {
        $counts = array();

        //twitter tweetcount
        $response = wp_remote_get('http://urls.api.twitter.com/1/urls/count.json?url=' . urlencode($url));
        if( !is_wp_error( $response ) && $response['response']['code'] === 200 ) {
            $decode_tweetcount = json_decode($response['body']);
            $twitter_tweetcount =
                isset($decode_tweetcount['count'])
                ? $decode_tweetcount['count']
                : 0;
        } else {
            $twitter_tweetcount = 0;
        }

        //set array
        $counts['twitter'] = $twitter_tweetcount;

        // set cache
        set_transient($transient_key, $counts, 60*60*1); // expires 60sec * 60min * 1 = 1hour
    }

    return $counts;
}