Preventing Duplicate Submissions

I don’t understand if you want the user to be able to (1) submit once only for both of the 2 forms or (2) once for each form.

(1)
Change
$formName = 'email_form';
to
$formName = array('form_name1', 'form_name2');
and change
if($name == $fieldName) {
to
if(in_array($name, $fieldName) {

(2)
Make a copy of the my_validate_email and name it something else.
Set the values of $formName and $fieldName
$fieldName must be a unique value not appearing on any other form
Copy the add_filter call, passing the name of the new copy of my_validate_email

hi michael,
thx for your help !!!!

i have more than 50 forms where to check if the user has submitted to each once a time. isn′t there a dynamically way to solve that for (2)?

as an idea:
– each form has it′s name in cf7. when a post was loaded with a form, the form name will be stored in the variable $formName.
– then it will be checked if the email was already submitted tothat actual loaded $formName. if so, no submission allowed.
is something like that possible, too?

would be great to get on in this case !!

thx & cheers, tom

No that doesn’t make sense. When you click the submit button, before the form is submitted, the value of the email field is sent to the validation function that you made. Your function receives the field name and field value but not the form name. Once that passes, then the form is submitted and CFDB has the form name in that.

You could ask on CF7 forum about CF7 supporting this.

hmm.. what about the opposite?
check if the email already exists… if yes, go on, if not refuse the submit.

You can code your validation function however you like.

Hi, i need help for preventing duplicate for 1 form and 2 tables.
Example:

table category
table moto_number

When 2x i send form with category_1 and number_1 = ERROR (duplicate)
When 1x i send form with category_1 and number_1 and after i send form with category_2 and number_1 = OK.

I will unique moto_number for one category and no for every categories.
Thx for help. Sorry for my bad english. I am from Czech Republic.

Preventing Duplicate Submissions from CF7 shows where you can add code to check for duplication.

I tried it, but it did not solve my problem.
I need a unique moto_number for every moto_category.
This code checks the item from all tables.

Example:

In order: Moto number 1 in category 1, moto number 1 in Category 2.

Not in order: Moto number 1 in category 1, moto number 1 in category 1

it will work?

You would have to adapt the code to suit your needs. In the function is_already_submitted you might add additional criteria to “filter” to search within a category.

It occurred to me too. But how to use it when the category name is also on the form? Can I use $ _POST function to filter?

Example:

$atts['filter'] = "$fieldName=$fieldValue&&kategorie=".$_POST["kategorie"]."";

Is it right?

It works. Thx for tip.:)

Is there any code or plugin that is supported by contact form 7 and can prevent duplicate phone number submissions..?

Michael, I have a related question:

I followed your solution at https://cfdbplugin.com/?page_id=904, and it seems to be working, except for one issue. It blocks a duplicate form submission, but it doesn’t use the error message I inputted into the Shortcodes, Actions, and Filters. Instead, it uses the generic error message from Contact Form 7 for any submission that fails to go through. How can I make the duplicate form submission error message override the generic failed submission message?

Thanks!

My example might be a little out of date.

Look at this:
https://contactform7.com/2015/03/28/custom-validation/

Do you see how the $tag variable is different from my example? I think things have changed in CF7 since I created my example.

I looked at the link and changed the code, but haven’t gotten it to work. Can you tell me if you see what I did wrong? (note, I used a dynamic hidden field to add the user’s email address)

Here is what I had from your example:

function my_validate_email($result, $tag) {
$formName = ‘Form 1’;
$fieldName = ‘dynamichidden-11’;
$name = $tag[‘name’];
if($name == $fieldName){
$valueToValidate = $_POST[$name];
if (is_already_submitted($formName, $fieldName, $valueToValidate)) {
$result->invalidate($name, ‘You have already submitted a rating.’);
}
}
return $result;
}

And this is what I changed it to:

function my_validate_email($result, $tag) {
$formName = ‘Form 1’;
$fieldName = ‘dynamichidden-11’;
$tag = new WPCF7_Shortcode( $tag );
if($tag == $fieldname){
$valueToValidate = $_POST[$tag];
if (is_already_submitted($formName, $fieldName, $valueToValidate)) {
$result->invalidate($tag, ‘You have already submitted a rating.’);
}
}
return $result;
}