sample.html

<script>
			<?php if ( $google_analytics_delay ) { ?>
				setTimeout(function(){
			<?php } ?>
			window.dataLayer = window.dataLayer || [];
			function gtag(){dataLayer.push(arguments);}
			gtag('js', new Date());

			gtag('config', '<?php echo esc_js( self::$ga_id ); ?>');
			<?php if ( $google_analytics_delay ) { ?>
				}, 3000);
			<?php } ?>
		</script>