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1. royscheeren
   Member
   Posted 1 year ago #

   Hi

   I would like to use a meta box to add a file to a post and use it as an attachment but I can't seem to figure it out.

   Currently I'm using this code:

   function save_post_bijlage($post_id, $post = null)
   {
   	global $post;
   	$filename = $_FILES['bijlage'];
   	//echo "1:" . $_FILES['bijlage'];
   	print_r($filename);
   
   	$wp_filetype = wp_check_filetype(basename($filename), null );
   	$attachment = array(
   						 'post_mime_type' => $wp_filetype['type'],
   						 'post_title' => preg_replace('/\.[^.]+$/', '', basename($filename)),
   						 'post_content' => '',
   						 'post_status' => 'inherit'
   	);
   	$attach_id = wp_insert_attachment( $attachment, $filename, $post_id );
   	// you must first include the image.php file
   	// for the function wp_generate_attachment_metadata() to work
   	require_once(ABSPATH . "wp-admin" . '/includes/image.php');
   	$attach_data = wp_generate_attachment_metadata( $attach_id, $filename );
   	wp_update_attachment_metadata( $attach_id,  $attach_data ); 
   
   }
   
   add_action('save_post', 'save_post_bijlage');

   and:

   add_action('admin_menu', 'publicatie_meta');
   function publicatie_meta() {
   add_meta_box("publicatie_bijlage", "Bijlage", "meta_options", "publicatie", "side", "low");
   }

   function meta_options() { ?>
   	<input type="file" name="bijlage" id="bijlage"/>
   <?php } ?>

   I can't seem to figure out the link between getting the file uploaded to the server and attaching the attachment to the post.

   I hope someone can help me out.

   Thanks

2. Geraint Palmer
   Member
   Posted 1 year ago #

   not sure if this is the cause of your problem, but according to this blog post any attached files dont get transmitted as the standard post form doesn't have the

   enctype=”multipart/form-data”

   tags. Anyway this is the post it might help.
   http://www.tanzilo.com/2009/01/15/wordpress-adding-a-custom-option-box-and-developing-file-upload-plugin/

3. royscheeren
   Member
   Posted 1 year ago #

   Thanks

   I found that post but it requires editing the core files. I'd rather not do that.

4. unodj
   Member
   Posted 1 year ago #

   royscheeren, try this

   <?php
   function modify_form(){
   echo  '<script type="text/javascript">
         jQuery("#post").attr("enctype", "multipart/form-data");
           </script>
     ';
   }
   add_action('admin_footer','modify_form');
   ?>

5. royscheeren
   Member
   Posted 1 year ago #

   Thnx unodj. Works like a charm.

   What would be the reason it's not there standard?

6. sirtimo
   Member
   Posted 1 year ago #

   I'm trying to implement exactly the same but can't figure out where to put which part of this code?

7. Jeff Sterup
   Member
   Posted 1 year ago #

   Look here if you want to add the media library upload to your meta box.

   http://sicdigital.com/2010/07/create-custom-post-type-for-image-upload-wordpress3/comment-page-1/#comment-829

8. Ian Dunn
   Member
   Posted 1 year ago #

   Using JavaScript to add the enctype is a bad idea because it won't work for users that have JavaScript turned off or who are using devices that don't support JavaScript. Instead, you should use the post_edit_form_tag filter, as described at http://codex.wordpress.org/Plugin_API/Filter_Reference/post_edit_form_tag.

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