gclid-field.php

<?php

add_action( 'wp_footer', function(){
	?>
	<script>

		function getParam(p) {
			var match = RegExp('[?&]' + p + '=([^&]*)').exec(window.location.search);
			return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
		}

		function getExpiryRecord(value) {
			var expiryPeriod = 90 * 24 * 60 * 60 * 1000; // 90 day expiry in milliseconds

			var expiryDate = new Date().getTime() + expiryPeriod;
			return {
				value: value,
				expiryDate: expiryDate,
			};
		}

		function addGclid() {
			var gclidParam = getParam('gclid');
			var gclidFormFields = ['gclid_field', 'foobar', 'hidden-1']; // all possible gclid form field ids here // Added hidden-1 Forminator field
			var gclidRecord = null;
			var currGclidFormField;

			var gclsrcParam = getParam('gclsrc');
			var isGclsrcValid = !gclsrcParam || gclsrcParam.indexOf('aw') !== -1;

			gclidFormFields.forEach(function (field) {
				if (document.getElementById(field)) {
				currGclidFormField = document.getElementById(field);
				}
			});

			if (gclidParam && isGclsrcValid) {
				gclidRecord = getExpiryRecord(gclidParam);
				localStorage.setItem('gclid', JSON.stringify(gclidRecord));
			}

			var gclid = gclidRecord || JSON.parse(localStorage.getItem('gclid'));
			var isGclidValid = gclid && new Date().getTime() < gclid.expiryDate;

			if (currGclidFormField && isGclidValid) {
				currGclidFormField.value = gclid.value;
			}
		}

		window.addEventListener('load', addGclid);

		(function($){
			$(function(){
				$(document).on('after.load.forminator', function( e, form_id ){
					$(function() {
						// Necessary when Form is loading from Ajax
						window.addEventListener('load', addGclid);
					});
				});
			});
		})(window.jQuery)

	</script>
	<?php
}, 999 );