Create Unique Fields in Fluent Forms

Turn phone number, email, or any other simple text input as a unique field. Use the input key instead of {input_key} for your input type. See the list of input keys in this link. Also, make sure the name attribute & form ID matches correctly.

For example for phone field use this hook : fluentform_validate_input_item_phone

add_filter('fluentform_validate_input_item_{input_key}', function ($errorMessage, $field, $formData, $fields, $form) {
    
	$fieldName       = 'phone';
	$target_form_id  = 13;

	if($target_form_id !=  $form->id){ return $errorMessage; }
   	
	
	if ($inputValue = \FluentForm\Framework\Helpers\ArrayHelper::get($formData, $fieldName)) {
		$exist = wpFluent()->table('fluentform_entry_details')
			->where('form_id', $form->id)
			->where('field_name', $fieldName)
			->where('field_value', $inputValue)
			->first();
	
		if ($exist) {
			 $errorMessage = "Error ! This field needs to be unique.";
			 return [$errorMessage];
		}
	}
   	
    return $errorMessage;

}, 10, 5);

Use this code in theme function.php file or any PHP code snippet plugin.

Feel free to share any insights or if you have a topic in mind you would like to see documentation and example code about it. For more discussion, join our Facebook group Fluent Forms Community.