Add a tag based on UTM parameters

Hi there,

I’m looking for a way to add a tag to MailChimp subscriber based on the UTM parameters in the URL.

We’ll have many different sources and instead of using many different forms, we want to use a single form and pass a specific UTM parameter as a tag.

I’m using your yikes-mailchimp-filter-before-submission filter but so far I was only able to push the UTM as a MERGE TAG field, but I can’t use them to trigger automations in MailChimp.

This is the code I have so far and it works for merge tags:

// UTM CAMPAIGN START

add_filter( 'yikes-mailchimp-filter-before-submission', 'add_ucampaign_to_mailchimp_submission', 10, 1 );

function add_ucampaign_to_mailchimp_submission( $mc_form_variables ) {

	// Set default utm_campaign
	$UCAMPAIGN = '';

	// Check URL $_GET vars for utm_campaign
	if ( isset( $_GET['utm_campaign'] ) && ! empty( $_GET['utm_campaign'] ) ) {
		$UCAMPAIGN = $_GET['utm_campaign'];
	}

	if ( isset( $mc_form_variables ) && ! empty( $mc_form_variables ) ) {
		$mc_form_variables['UCAMPAIGN'] = $UCAMPAIGN;
	}

	return $mc_form_variables;
}

// UTM CAMPAIGN END// UTM CAMPAIGN START

add_filter( 'yikes-mailchimp-filter-before-submission', 'add_ucampaign_to_mailchimp_submission', 10, 1 );

function add_ucampaign_to_mailchimp_submission( $mc_form_variables ) {

	// Set default utm_campaign
	$UCAMPAIGN = '';

	// Check URL $_GET vars for utm_campaign
	if ( isset( $_GET['utm_campaign'] ) && ! empty( $_GET['utm_campaign'] ) ) {
		$UCAMPAIGN = $_GET['utm_campaign'];
	}

	if ( isset( $mc_form_variables ) && ! empty( $mc_form_variables ) ) {
		$mc_form_variables['UCAMPAIGN'] = $UCAMPAIGN;
	}

	return $mc_form_variables;
}

// UTM CAMPAIGN END

I saw in your documentation that you have this filter as well:
yikes-mailchimp-process-default-tag

Would I use that one to add tags and how?

I appreciate your help!

Thanks!