I created webform and saving submitted data into text file in drupal files folder. A remote script performs calculations and outputs new text file to the same folder . I want cron to run everytime text file is generated, so that i can print result from text file to webform and also save them to database

So far i created custom module for webform and used hook_cron() as shown below

function simulation_ignition_view_cron()
  $uri = 'default/files/simulation/generatedfile.txt';
  if (file_exists($uri)) {
  drupal_set_message("hello cron");

Please let me know if my explanation is not clear and please give some suggestions

1 Answer 1


I want cron to run everytime text file is generated

I think you're misunderstanding what cron is. Cron is

a command to an operating system or server for a job that is to be executed at a specified time.

It doesn't respond to file system triggers, it's a scheduled task.

If a file is created as part of the normal Drupal content add/edit, you can just implement hook_file_insert():

function MYMODULE_file_insert($file) {
  if ($file->uri == 'foo') {
    // Do something.

If you want to start the scheduled jobs running in that hook you can use drupal_cron_run(), but it would probably make more sense not to involve cron in this.

  • Thanks for you reply . I will try using hook_file_insert
    – Naveena
    Aug 27, 2014 at 13:34

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