抓取WordPress帖子的图像并显示它？

Question

Is there a way to grab a post's first image and have it displayed as a thumbnail link to the post itself on the homepage? I can't seem to figure it out. Prefer not to use the featured image function. Is there a workaround? Any help would be much appreciated.

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Would I be able to use the following code to acheive what I want? It doesn't seem like I can specify a post ID, but maybe i'm wrong?

http://www.wordimpressed.com/wordpress/get-the-first-image-from-a-post-and-display-it/

My main concern is grabbing a few posts and being able to display them on the frontpage/homepage. Is that possible?

Answer 1

You could do it through two ways:

function post_photo_count_attachments( $post_id ) {

    $attachments = get_children(
        array( 'post_parent' => $post_id ) 
    );

    return( $attachments[0] );

}

Or by Query/XPath method:

function post_photo_count_xpath( $post_id ) {
    global $wpdb;

    $post_id_safe = intval( $post_id );

    $html = $wpdb->get_row(
        "select * from {$wpdb->posts} where ID={$post_id_safe} limit 1"
    );

    $doc = new DOMDocument();
    @$doc->loadHTML( $html->post_content );
    $path = new DOMXpath( $doc );
    $images = $path->query( "//img" );

    return( $images->item(0)->getAttribute('src') );
}

print_r() these returns for more detailed information.