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- <?php
- /*
- Plugin Name: GTM
- Description: Inserts GTM tracking code
- Version: 1.0
- Author: Jose Cajide
- Author URI: http://es.linkedin.com/in/jrcajide/
- Plugin URI: http://es.linkedin.com/in/jrcajide/
- */
- add_filter('template_include','gtm_include',1);
- function gtm_include($template) {
- ob_start();
- return $template;
- }
- add_filter('shutdown','gtm_code',0);
- function gtm_code() {
- $insert = "<!-- Google Tag Manager -->
- <noscript><iframe src='//www.googletagmanager.com/ns.html?id=GTM-XXXX'
- height='0' width='0' style='display:none;visibility:hidden'></iframe></noscript>
- <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
- new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
- j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
- '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
- })(window,document,'script','dataLayer','GTM-XXXX');</script>
- <!-- End Google Tag Manager -->";
- $content = ob_get_clean();
- $content = preg_replace('#<body([^>]*)>#i',"<body$1>{$insert}",$content);
- echo $content;
- }
- ?>
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