Embed Google Analytics

// functions.php
<?php
function sp_google_analytics() { ?>
  <!-- Global site tag (gtag.js) - Google Analytics -->
  <script async src="https://www.googletagmanager.com/gtag/js?id=UA-xxxxxxxxxx"></script>
  <script>
    window.dataLayer = window.dataLayer || [];
    function gtag(){
      dataLayer.push(arguments);
    }
    gtag('js', new Date());
    gtag('config', 'UA-xxxxxxxxxx');
  </script>
<?php
}
add_action( 'wp_head', 'sp_google_analytics' );
?>

Will correctly add Google Analytics code into the website <head> tag.

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