CiviCRM Community Forums (archive)

I asked the question originally. I still need an answer. I hope we find one this time.

Thanks for the suggestion -

I came up with the code below using the validate hook.  It works, but I realize now that I really want this to happen before the form is submitted - part of the problem is that impatient users try to upload very large files and think that the site is broken.  I looked around a bit and it seems that this is not trivial to do if you want to support IE as well as older browsers - requiring something like uploadify.  I don't know how that would or could be integrated into civi.  I tried to look at how CCK does it, and was surprised to find that (at least on my installation) d7's image field allows you to set a max file size, but doesn't enforce it.  So for example, I set the max file size for a particular field in a content type as 1 MB, and I see the text "Files must be less than 1 MB" when I add or edit a node of that type,  but I can upload files of 5MB or more, up to the server limit.

I'm sharing the code below mostly for the benefit of penguintrax, in case this is helpful for that use case.

(Actually this code only almost works, I get the message "Warning: array_merge() [function.array-merge]: Argument #2 is not an array in CRM_Utils_Hook->runHooks() (line 125 of /home4/uppermad/public_html/sites/all/modules/civicrm/CRM/Utils/Hook.php)."  on subsequent pages.  I haven't figured out why.)

 
<?php

/**
 * The maximum allowed file size.
 */
define('MAX_ALLOWED_FILE_SIZE', 2097152); //2 megabytes in bytes

/**
 * Check file sizes
 * true if form validates successfully, otherwise array with input field names as keys and error message strings as values
 */
 
function mymodule_civicrm_validate( $formName, &$fields, &$files, &$form ){
  $errors = array();
  if ($formName == 'CRM_Event_Form_Registration_Register') {
  
     foreach ($files as $key => $file){
   if($file['size']>=MAX_ALLOWED_FILE_SIZE){
   $errors[$key] = ts('The maximum file size allowed is '. round((MAX_ALLOWED_FILE_SIZE/1048576),2) .' MB. '. $file['name'] .' is about '. round(($file['size'] * 9.5367431640625e-7),2) .' MB');
   }
   }
} 
  return empty($errors) ? true : $errors;
}