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alex05 on "WordPress Gallery Upload Limit"

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I'm trying to limit the amount of files a user can upload through the wp gallery, and i've found the following filter

add_filter('wp_handle_upload_prefilter', 'yoursite_wp_handle_upload_prefilter');
function yoursite_wp_handle_upload_prefilter($file) {
  list($category,$type) = explode('/',$file['type']);
  if ('image'!=$category || !in_array($type,array('jpg','jpeg','gif','png'))) {
    $file['error'] = "Sorry, you can only upload a .GIF, a .JPG, or a .PNG image file.";
  } else if ($post_id = (isset($_REQUEST['post_id']) ? $_REQUEST['post_id'] : false)) {
    if (count(get_posts("post_type=attachment&post_parent={$post_id}"))>0)
      $file['error'] = "Sorry, you cannot upload more than one (1) image.";
  }
  return $file;
}

However this filter works only on the current post, what i'm trying to achieve is to limit the upload only on that instance when the user opens the uploader, is it possible?


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