Returns HTML for help text based on file upload validators.

Parameters

$variables: An associative array containing:

• description: The normal description for this field, specified by the user.
• upload_validators: An array of upload validators as used in $element['#upload_validators'].

Related topics

File

drupal-7.x/modules/file/file.field.inc, line 933

Field module functionality for the File module.

Code

function theme_file_upload_help($variables) {
  $description = $variables['description'];
  $upload_validators = $variables['upload_validators'];

  $descriptions = array();

  if (strlen($description)) {
    $descriptions[] = $description;
  }
  if (isset($upload_validators['file_validate_size'])) {
    $descriptions[] = t('Files must be less than !size.', array('!size' => '<strong>' . format_size($upload_validators['file_validate_size'][0]) . '</strong>'));
  }
  if (isset($upload_validators['file_validate_extensions'])) {
    $descriptions[] = t('Allowed file types: !extensions.', array('!extensions' => '<strong>' . check_plain($upload_validators['file_validate_extensions'][0]) . '</strong>'));
  }
  if (isset($upload_validators['file_validate_image_resolution'])) {
    $max = $upload_validators['file_validate_image_resolution'][0];
    $min = $upload_validators['file_validate_image_resolution'][1];
    if ($min && $max && $min == $max) {
      $descriptions[] = t('Images must be exactly !size pixels.', array('!size' => '<strong>' . $max . '</strong>'));
    }
    elseif ($min && $max) {
      $descriptions[] = t('Images must be between !min and !max pixels.', array('!min' => '<strong>' . $min . '</strong>', '!max' => '<strong>' . $max . '</strong>'));
    }
    elseif ($min) {
      $descriptions[] = t('Images must be larger than !min pixels.', array('!min' => '<strong>' . $min . '</strong>'));
    }
    elseif ($max) {
      $descriptions[] = t('Images must be smaller than !max pixels.', array('!max' => '<strong>' . $max . '</strong>'));
    }
  }

  return implode('<br />', $descriptions);
}