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1. joshkadis
   Member
   Posted 7 months ago #

   Is there a public PHP function that I call to regenerate the thumbnails for a specific image by passing the attachment's ID?

   http://wordpress.org/extend/plugins/regenerate-thumbnails/

2. Alex Mills (Viper007Bond)
   Moderator
   Posted 6 months ago #

   Yes, look at how the ajax_process_image() function in my plugin works.

   Basically it's this though, although you should check for errors along the way (see function):

   // Get path
   $fullsizepath = get_attached_file( $image_ID );
   
   // Generate meta data (this makes the thumbnail images)
   $metadata = wp_generate_attachment_metadata( $image_ID, $fullsizepath );
   
   // Save the meta data so WP knows the thumbs exist
   wp_update_attachment_metadata( $image_ID, $metadata );

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