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Drupal form validation not working for me

By : Alfred Salib
Date : October 16 2020, 11:12 PM
I think the issue was by ths following , Since you are using form alter, so you don't create the form yourself, you should add the validation handler yourself:
code :

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Drupal form validation functions

By : TC1080
Date : March 29 2020, 07:55 AM
To fix the issue you can do Rimian is both correct and wrong.
The good thing as Rimian points out, is that you can attach any validation function to your form fields using the #element_validate.

Form with email validation with Drupal

By : Nosov Sergey
Date : March 29 2020, 07:55 AM
like below fixes the issue I guess there are better solutions, but here is a rather simple way. I assume you do know how to basically do stuff in Drupal like creating forms, storing information in the database, sending mails and so on. If not, there is a link for each...
Define a table with email (varchar), key (varchar), status (int) (hook_schema) Create a form where the user can enter the email (how to create a form Store the mail in the database together with a random key (like md5($mail . uniqueid()) (db_insert for D7, db_query for D6), set status to 0 Send a mail to the user with a link that contains the key like yourmodule/verify/$key (drupal_mail Register that path (yourmodule/verifiy/%) in hook_menu When the user clicks on the link, look for that key in the database and set status to 1 (db_query + db_update (D7 only)) Done, all mails with status 1 are now confirmed.

How to use form validation in Drupal 7

By : Parakh Chauhan
Date : March 29 2020, 07:55 AM
Hope that helps You need to attach the #validate property to the form submit button like this:
code :
$form['submit']['#validate'][] = 'checkout_confirm_email_form_validate'

Drupal form validation repeat form error twice

By : Anderson Quaresma
Date : March 29 2020, 07:55 AM
I hope this helps . Hook Implementation: I had resolved this issue by implementing the hook as given below
code :
    $variables['custom_form_name'] = drupal_get_form('custom_form');
<?php print render($custom_form_name); ?>

How to do form validation in drupal?

By : Gary Gasson
Date : March 29 2020, 07:55 AM
I hope this helps . Implements the hook_form_alter() to add a validation callback (throught the #validate) argument.
In this callback you will have at your disposal the two values of the fields, you will simply have to had a statement to check the values and display an error message if the statement is not good.
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