输出缩略图地址

//输出缩略图地址

function post_thumbnail_src() {

    global $post;

    if ($values = get_post_custom_values("thumb")) {   //输出自定义域图片地址

        $values = get_post_custom_values("thumb");

        $post_thumbnail_src = $values [0];

    } elseif (has_post_thumbnail()) {    //如果有特色缩略图，则输出缩略图地址

        $thumbnail_src = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'full');

        $post_thumbnail_src = $thumbnail_src [0];

    } else {

        $post_thumbnail_src = '';

    };

    echo $post_thumbnail_src;

}