Getting featured image setting as background

Question

I'm using the code below to get the posts featured image URL. I need to be able to get the large size image, right now it's getting the URL to the original size image.

<?php $src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID, 'ttrust_post_thumb_big'), array( 5600,1000 ), false, '' );?>

<a href="<?php the_permalink() ?>" rel="bookmark" class="imagewrap"><div style="background: url(<?php echo $src[0]; ?> ) !important;"></div></a>    

Answer 1

There are some mistakes in the code you are using (AFAIK):

1. get_post_thumbnail_id($post->ID, 'ttrust_post_thumb_big') only has one parameter, that is post_id. So, it should just be get_post_thumbnail_id($post->ID)

2. '' — there's no 4th parameter for wp_get_attachment_image_src

3. array( 5600,1000 ) defines the $size of the image you want to be shown. You should be using 'large' (string) since that's what you said you need.

Okay, now try this:

<a href="<?php the_permalink() ?>" rel="bookmark" class="imagewrap">
    <div style="background: url(<?php wp_get_attachment_image_src( get_post_thumbnail_id(), 'large' ); ?>) !important;"></div>
</a>

Reference links: get_post_thumbnail_id, wp_get_attachment_image_src