I'm setting up a forum for our company and I'm trying to extract some information from an array but not having any luck. If I use the below to display the array, the information I want to extract is '[icon_url]'

Can anyone help me?

PHP Code:
print_r($context['get_message']()); 
Array ( [attachment] => Array ( ) [alternate] => 0 [id] => 3 [href] => http://localhost/blog/index.php?topic=2.msg3#msg3 [link] => [RESOLVED]subject [member] => Array ( [username] => Mark [name] => Mark [id] => 2 [is_guest] => [is_buddy] => [is_reverse_buddy] => [buddies] => Array ( ) [title] => [href] => http://localhost/blog/index.php?action=profile;u=2 [link] => Mark [email] => [email protected] [hide_email] => [email_public] => 1 [registered] => March 20, 2007, 07:09:10 pm [registered_timestamp] => 1174378150 [blurb] => [gender] => Array ( [name] => [image] => ) [website] => Array ( [title] => [url] => ) [birth_date] => 0000-00-00 [signature] => [location] => [icq] => Array ( [name] => [add] => [href] => [link] => [link_text] => ) [aim] => Array ( [name] => [href] => [link] => [link_text] => ) [yim] => Array ( [name] => [href] => [link] => [link_text] => ) [msn] => Array ( [name] => [href] => [link] => [link_text] => ) [real_posts] => 5 [posts] => 5 [avatar] => Array ( [name] => [image] => [href] => [url] => ) [last_login] => Today at 09:32:24 pm [last_login_timestamp] => 1174559544 [karma] => Array ( [good] => 1 [bad] => 1 [allow] => ) [ip] => 127.0.0.1 [ip2] => 127.0.0.1 [online] => Array ( [is_online] => 1 [text] => Online [href] => http://localhost/blog/index.php?action=pm;sa=send;u=2 [link] => Online [image_href] => http://localhost/blog/Themes/default/images/useron.gif [label] => Personal Message (Online) ) [language] => [is_activated] => 1 [is_banned] => [options] => Array ( [show_board_desc] => 1 [show_children] => 0 [show_no_avatars] => 0 [show_no_signatures] => 0 [return_to_post] => 1 [no_new_reply_warning] => 0 [view_newest_first] => 0 [view_newest_pm_first] => 0 [calendar_start_day] => 0 [display_quick_reply] => 0 [display_quick_mod] => 0 [auto_notify] => 1 [collapse_header] => 1 ) [group] => [group_color] => [group_id] => 0 [post_group] => Newbie [post_group_color] => [group_stars] => [local_time] => March 22, 2007, 09:32:31 pm [can_view_profile] => 1 [is_topic_starter] => 1 ) [icon] => solved [icon_url] => http://localhost/blog/Themes/default/images/post/solved.gif [subject] => [RESOLVED]subject [time] => March 20, 2007, 07:29:28 pm [timestamp] => 1174379368 [counter] => 0 [modified] => Array ( [time] => January 01, 1970, 11:00:00 am [timestamp] => 0 [name] => ) [body] => Test