Drupal - imagecache problems with special characters

Added Sat, 27/09/2008 - 18:35

We came across this problem on one of our Drupal sites the other day, someone uploaded an image with an ampersand in the filename, and imagecache refused to display the image. A bit of investigating revealed that imagecache had a problem with a number of special characters in the image filenames.

The solution is a little imagecache theme override - you can see examples for both Drupal5 and Drupal6 below

Drupal 5 version

<?php
function phptemplate_imagecache($namespace, $path, $alt = '', $title = '',
$attributes = NULL) {
  $attributes = drupal_attributes($attributes);
  $imagecache_path = file_create_url(file_directory_path() .'/imagecache/'.
$namespace .'/'. drupal_urlencode($path));
  return '<img src="'. $imagecache_path .'" alt="'. check_plain($alt) .'" title="'. check_plain($title) .'" '. $attributes .' />';
}
?>

Drupal 6 version

<?php
function phptemplate_imagecache($namespace, $path, $alt = '', $title = '', $attributes = NULL) {
  if ($image = image_get_info(imagecache_create_path($namespace, $path))) {
    $attributes['width'] = $image['width'];
    $attributes['height'] = $image['height'];
  }
  // check is_null so people can intentionally pass an empty
  // array of attributes to override
  // the defaults completely... if
  if (is_null($attributes)) {
    $attributes['class'] = 'imagecache imagecache-'. $namespace;
  }
  $attributes = drupal_attributes($attributes);
  $imagecache_url = imagecache_create_url($namespace, drupal_urlencode($path));
  return '<img src="'. $imagecache_url .'" alt="'.
check_plain($alt) .'" title="'. check_plain($title) .'" '. $attributes .' />';
}
?>

Drupal - imagecache problems with special characters