This adds your Facebook/Meta Pixel Analytics ID to the head of your public-facing WordPress pages (not your admin pages) and only for users who aren’t logged-in.
Replace the XXXXXXXXX with your ID and you’re good to go.
By default, it assumes you want to add the script. However, if you’re using my Env555 script, it will also attempt to only add the analytics tag to Production environments, so that you’re not collecting data from any local, development, or staging sites.
<?php
/* Requires Env555 */
namespace NThgdKCU;
\add_action( 'wp_head', function () {
$fbID = "XXXXXXXXXXXXXXXX";
$addCode = true;
if (function_exists('\Env555\this_is_a_production_site')) {
// only on production for logged out users
$addCode = (\Env555\this_is_a_production_site() && !\is_user_logged_in());
}
if ($addCode === true) {
?>
<!-- Analytics: Facebook Meta Pixel in wp_head on Production -->
<script>
!function(f,b,e,v,n,t,s){
if(f.fbq)return;n=f.fbq=function(){n.callMethod?n.callMethod.apply(n,arguments):n.queue.push(arguments)};
if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';n.queue=[];t=b.createElement(e);t.async=!0;t.src=v;
s=b.getElementsByTagName(e)[0];s.parentNode.insertBefore(t,s);
}(window,document,'script','https://connect.facebook.net/en_US/fbevents.js');
fbq('init', "<?php echo $fbID; ?>");
fbq('track', 'PageView');
</script>
<noscript>
<img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=<?php echo $fbID; ?>&ev=PageView&noscript=1"/>
</noscript>
<?php } }, 1000 );
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