MixPanel Wordpress Tracking Snippet - Add to the end of your WP Theme's functions.php file. Replace YOUR_MIXPANEL_TOKEN with the one from your MixPanel account.

gistfile1.php

<?php
add_action('wp_head', 'mixpanel_meta_codes');
 
function mixpanel_meta_codes() {
?>
<!-- start Mixpanel --><script type="text/javascript">(function(e,b){if(!b.__SV){var a,f,i,g;window.mixpanel=b;a=e.createElement("script");a.type="text/javascript";a.async=!0;a.src=("https:"===e.location.protocol?"https:":"http:")+'//cdn.mxpnl.com/libs/mixpanel-2.2.min.js';f=e.getElementsByTagName("script")[0];f.parentNode.insertBefore(a,f);b._i=[];b.init=function(a,e,d){function f(b,h){var a=h.split(".");2==a.length&&(b=b[a[0]],h=a[1]);b[h]=function(){b.push([h].concat(Array.prototype.slice.call(arguments,0)))}}var c=b;"undefined"!==
typeof d?c=b[d]=[]:d="mixpanel";c.people=c.people||[];c.toString=function(b){var a="mixpanel";"mixpanel"!==d&&(a+="."+d);b||(a+=" (stub)");return a};c.people.toString=function(){return c.toString(1)+".people (stub)"};i="disable track track_pageview track_links track_forms register register_once alias unregister identify name_tag set_config people.set people.set_once people.increment people.append people.track_charge people.clear_charges people.delete_user".split(" ");for(g=0;g<i.length;g++)f(c,i[g]);
b._i.push([a,e,d])};b.__SV=1.2}})(document,window.mixpanel||[]);
mixpanel.init("YOUR_MIXPANEL_TOKEN");</script><!-- end Mixpanel -->
<script type="text/javascript">
	mixpanel.set_config({
		"track_links_timeout": 750
	});
	
	mixpanel.register_once({
		"Landing Page": window.location.href
	});
 
<?php if (is_front_page()) { /* Homepage */ ?>
	mixpanel.track("Viewed Homepage");
<?php } ?>
<?php if (is_single()) { /* Article Page */ ?>
	mixpanel.track(
		"Viewed Article",
		{
			"Post ID": "<?= get_the_ID(); ?>",
			"Post Title": "<?= addslashes(the_title('', '', false)); ?>"
		}
	);
<?php } ?>
<?php if (is_page()) { /* Content Page */ ?>
	mixpanel.track(
		"Viewed Page",
		{
			"Page ID": "<?= get_the_ID(); ?>",
			"Page Title": "<?= addslashes(the_title('', '', false)); ?>"
		}
	);
<?php } ?>
<?php if (is_category()) { /* Category Page */ ?>
	mixpanel.track(
		"Viewed Category",
		{
			"Category Name": "<?= addslashes(single_cat_title('', false)); ?>"
		}
	);
<?php } ?>
<?php if (is_tag()) { /* Tag Page */ ?>
	mixpanel.track(
		"Viewed Tag",
		{
			"Tag Name": "<?= addslashes(single_tag_title('', false)); ?>"
		}
	);
<?php } ?>
<?php if (is_author()) { /* Author Page */ ?>
	mixpanel.track("Viewed Author");
<?php } ?>

<?php /* Track Link Click - 
  add the class `track-click` to any A element to track click on it
  add the data attribute `data-name` to the A element to label the link
*/ ?>
  mixpanel.track_links("a.track-click", "Click", function(ele) {
		var returnVars = { 
			"Page": window.location.href,
			"Link": $(ele).attr("href") || "",
			"Click Name": $(ele).data("name")
		};
		return returnVars;
	});
 
<?php /* Track Email Form - 
  add the class `track-form` to any FORM element to track it
  add the data attribute `data-form-name` to the FORM element to label the link
  add the class `track-email` to the input field which contains the email (optional)
  add the class `track-name` to the input field which contains the name (optional)
*/ ?>
	mixpanel.track_forms("form.track-form", "Form Signup", function(ele) {
        var name = $("input.track-name", ele).val() || "";
        var email = $("input.track-email", ele).val() || "";
        if (email) {
	        // Optimizely Conversion
	        window.optimizely = window.optimizely || []; 
	        window.optimizely.push(['trackEvent', "email_opt_in"]);
	        
	        // Qualaroo Identify
	        window._kiq = window._kiq || []; 
	        window._kiq.push(["identify", email]);
	        
			    mixpanel.people.set({"$email": email});
	        mixpanel.register({"Email": email});
 
	        if (name) { 
	        	mixpanel.name_tag(name);
	        	mixpanel.people.set({"$name": name});
	        	mixpanel.register({"Name": name}); 
	        } else {
	        	mixpanel.name_tag(email);
	        }
 
	        mixpanel.alias(email);
	        var returnVars = { 
	            "Page": window.location.href,
	            "Form Name": $(ele).data("formName") || ""
	        };
 
	        return returnVars;
	    } else { 
	    	return false;
	    }
	});
 
</script>
<?php
}
?>