[wp-trac] [WordPress Trac] #22891: WordPress Filter media_buttons_context is Not Working in WP Version 3.5

[WordPress Trac]

#22891: WordPress Filter media_buttons_context is Not Working in WP Version 3.5
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 Reporter:  onetarek                    |       Type:  defect (bug)
   Status:  new                         |   Priority:  normal
Milestone:  Awaiting Review             |  Component:  Editor
  Version:  3.5                         |   Severity:  normal
 Keywords:  dev-feedback needs-testing  |
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 I am using the filter 'media_buttons_context' to add my custom media
 button beside the media upload button in the post/page editor.
 After updating wordPress to version 3.5 my button is not being
 shown.[[BR]]

 My codes are bellow:[[BR]]

 <?php[[BR]]
 function wp_myplugin_media_button($context) {
         $wp_myplugin_media_button = ' %s' . '<a href="media-
 upload.php?type=upload&TB_iframe=true&tab=upload" class="thickbox"><img
 src="http://onetarek.com/wp-content/uploads/2012/12/shortcode_btn.png"
 width=15 height=15 /></a>';[[BR]]

         return sprintf($context, $wp_myplugin_media_button);
 }

 add_action('media_buttons_context', 'wp_myplugin_media_button');[[BR]]
 ?>


 What is the main reason of this problem with wp 3.5?

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Ticket URL: <http://core.trac.wordpress.org/ticket/22891>
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