Preventing Duplicate Submissions from CF7

I use this http://cfdbplugin.com/?s=Preventing+Duplicate+Submissions+from+CF7 and its working. I want to use it in different form. How to do this? Should I create new function of mu_validate_email? Like this

function my_validate_email($result, $tag) {
$formName = ’email_form’; // Name of the form containing this field
$fieldName = ’email_123′; // Set to your form’s unique field name
$name = $tag[‘name’];
if($name == $fieldName){
$valueToValidate = $_POST[$name];
if (is_already_submitted($formName, $fieldName, $valueToValidate)) {
$result->invalidate($name, ‘Email has already been submitted’); // error message
}
}
return $result;
}

function my_validate_email1($result, $tag) {
$formName = ’email_form’; // Name of the form containing this field
$fieldName = ’email_123′; // Set to your form’s unique field name
$name = $tag[‘name’];
if($name == $fieldName){
$valueToValidate = $_POST[$name];
if (is_already_submitted($formName, $fieldName, $valueToValidate)) {
$result->invalidate($name, ‘Email has already been submitted’); // error message
}
}
return $result;
}

// use this if your field is a required fields on your form
add_filter(‘wpcf7_validate_email*’, ‘my_validate_email’, 10, 2);
// use this if your field is not a required field on your form
add_filter(‘wpcf7_validate_email’, ‘my_validate_email’, 10, 2);
// use this if your field is a required fields on your form
add_filter(‘wpcf7_validate_email1*’, ‘my_validate_email’, 10, 2);
// use this if your field is not a required field on your form
add_filter(‘wpcf7_validate_email1’, ‘my_validate_email’, 10, 2);

https://wordpress.org/plugins/contact-form-7-to-database-extension/