Wordpress Caption and Description

function retrieve_full_image_info($input){
    $options = $input;
    $numberofslides= $options['numberofslides'];
    //Set an array to store all the image URLs from my options and the current index in the array.
    $arrayofurls= array();
    for ($i=0; $i<$numberofslides;$i++){
        $arrayofurls[$i]=$options['wdlmg_image_option'.$i];
        $arrayofurls[$i]['index']=$i;
    }
    //This below is what gets the attachment files.
    $args = array( 'post_type' => 'attachment', 'numberposts' => -1, 'post_status' => null, 'post_parent' => null );
    $attachments = get_posts( $args );
    //Now we check if the urls we obtained from the media uploader with the attachment url
    if (!empty($attachments)) {
        foreach ( $attachments as $post ) {

        $id=$post->ID;
        $current = wp_get_attachment_url($id);

            foreach ($arrayofurls as $url){
            $wanted= $url['url'];
                if($current == $wanted){
                    $index= $url['index'];
                    setup_postdata($post);
                    $options['wdlmg_image_option'.$index]['id']=$id;
                    $options['wdlmg_image_option'.$index]['title']=$post->post_title;
                    $three= wp_get_attachment_image_src($id);
                    $options['wdlmg_image_option'.$index]['width']=$three[1];
                    $options['wdlmg_image_option'.$index]['height']=$three[2];
                    $content= $post->post_content;
                    $options['wdlmg_image_option'.$index]['description']=$content;
                    //by default if caption is empty, its the description
                    $caption=$post->post_excerpt;
                    if($caption!=$content){
                        $options['wdlmg_image_option'.$index]['caption']=$caption;
                    }//end if
                                        //remove this url from list since we got its details.
                    unset($arrayofurls[$index]);
                }//end if
            }//end foreach
        }//end foreach
    }//endif
    return $options;
}//end function