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How can we modify the form validation of drupal?
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Answer / Geetanjali
In Drupal, you can customize form validation by implementing the hook_form_alter() in your custom module. This hook allows you to alter existing forms or create new ones. To validate a form, you should implement the hook_form_validate() inside your custom module. Here is an example of how it looks:nn```phpnfunction MYMODULE_form_alter(&$form, &$form_state, $form_id) {n if ($form_id === 'my_custom_form_id') {n // Add custom validation rules.n n }n}nnfunction MYMODULE_form_validate($form, &$form_state) {n // Perform validation checks.n}n```
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