How can I obtain ID of images attached (and not necessarily inserted) to a custom post type ? I want to pass this argument in order to use this images in soliloquy slider

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    – kaiser
    Commented Sep 17, 2014 at 20:37

2 Answers 2


Use this function get_attached_media

$images = get_attached_media( 'image' );

You can also pass as a second parameter the ID of a post.

This function returns and array of Post object, the ID is in the ID property.


You can get the array of Image ID by using this function

if (!function_exists('get_associated_media')) {

    function get_associated_media($post_id) {
        $attachmentIds = array();
        $media = get_children(array(
            'post_type' => 'attachment',
            'post_parent' => $post_id,
            'post_status' => 'inherit',
            'post_mime_type' => array('image/jpeg', 'image/gif', 'image/png'),
            'numberposts' => -1

        foreach ($media as $file) {
            $attachmentIds[] = $file->ID;
        $attachmentIds[] = get_post_thumbnail_id($post_id);
        return array_unique($attachmentIds);

This code goes in function.php file of your active child theme (or theme) or also in any plugin file.

The code is tested and fully functional.

USAGE: You have to pass the Post ID in this function and you will get the images ids.


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