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1. refulez
   Member
   Posted 9 months ago #

   Hi,
   i need to generate thumbnails for a image taken from a custom field.
   how do i do that?
   i need to set thumbnail sizes like this
   "set_post_thumbnail_size( 50, 50 ); // 50 pixels wide by 50 pixels tall, resize mode"
   but for a image taken from a custom field of a post.

   Thanks.

2. security_man
   Member
   Posted 9 months ago #

   i would just upload it and then paste the url of the thumbnail into the custom field...

3. refulez
   Member
   Posted 9 months ago #

   i have a script that inserts the link of the image into the custom field. but what i need is: the wordpress thumbnail generator to use that image and generate thumbs of other sizes.

   so i don;t have to use resizing scripts like timthumb.

   so how do i get the wordpress thumbnail generator to use the image in a custom field?

4. security_man
   Member
   Posted 9 months ago #

   are you uploading the image to your wordpress install?

5. refulez
   Member
   Posted 9 months ago #

   i'm uploading them to a folder on the server and the i have a script that parses the folder and inserts into the database the link to the image.

   so any idea how to use a custom field for the thumbnail generation?

6. security_man
   Member
   Posted 9 months ago #

   check out the link below, it has what you are looking for and specifically wp_insert_attachment() is the function you need.

   http://wordpress.stackexchange.com/questions/4307/how-can-i-add-an-image-upload-field-directly-to-a-custom-write-panel/4413#4413

7. refulez
   Member
   Posted 9 months ago #

   thanks!

   here is the script in case someone else is looking for something like this

   $value is the filename
   
   $save_path = "folder/";
   $file = realpath($save_path).'/'.$value;
   $wp_filetype = wp_check_filetype(basename($file), null );
   
       // Construct the attachment array
       $attachment = array(
       'post_mime_type' => $wp_filetype['type'],
       'guid' => $file,
       'post_title' => preg_replace('/\.[^.]+$/', '', basename($post_name)),
       'post_content' => '',
       'post_parent' => $post_id,
   'post_status' => 'inherit'
       );
   
       // Save the data
       $id = wp_insert_attachment($attachment, $file, $post_id);
    $attach_data = wp_generate_attachment_metadata( $id, $file );
     wp_update_attachment_metadata( $id, $attach_data );
   set_post_thumbnail( $post_id, $id );

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