imce_image_info replacement for pantheon. Replace function in inc/imce.page.inc. Based on http://helpdesk.getpantheon.com/customer/portal/articles/805234-working-with-imce-on-pantheon and http://drupal.org/node/1822320

imce_image_info_replacement.php

<?php
/**
 * Check if the file is an image and return info.
 */
function imce_image_info($file) {
  if (function_exists('apc_fetch')) {
    $cache = apc_fetch($file);
    if ($cache) {
      return $cache;
    }
  }
  $mimes = array('image/jpeg' => IMAGETYPE_JPEG, 'image/gif'  => IMAGETYPE_GIF, 'image/png'  => IMAGETYPE_PNG);
  if (is_file($file) && ($dot = strrpos($file, '.')) && in_array(strtolower(substr($file, $dot+1)), array('jpg', 'jpeg', 'gif', 'png'))
    && ($info = @image_get_info($file)) && isset($mimes[$info['mime_type']]) ) {
    $result = array(
        'width' => $info['width'],
        'height' => $info['height'],
        'type' => $mimes[$info['mime_type']],
        'mime' => $info['mime_type']
        );
    apc_add($file, $result);
    return $result;
  }

  return FALSE;
}