I need to update a webform submission using function drupal_form_submit.

And upon updating an error is displayed.

This form could not be submitted because $_POST was truncated to 5 input vars. PHP max_input_vars is 10000 and needs to be increased

I tried to increase max_input_vars value even up to billion, but it doesn't helps.

The webform is very big and complicated.

Here I can't use function webform_submission_update, because some form alter and form validation functions must be executed upon the webform submission updated.

1 Answer 1


According to this post:


If it's a custom webform template, you may need to add, at the end of the form:

<?php print drupal_render_children($form); ?>

See also this related issue here: https://www.drupal.org/node/2417757

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.