google-tag-manager / google-tag-manager.php

google-tag-manager.php in Google Tag Manager 1.0.1, at google-tag-manager.php

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1	<?php
2	/*
3	Plugin Name: Google Tag Manager
4	Plugin URI: http://wordpress.org/extend/plugins/google-tag-manager/
5	Description: This is an implementation of the new Tag Management system from Google. It adds a field to the existing General Settings page for the ID, and if specified, outputs the tag management javascript in the page footer.
6	Version: 1.0.1
7	Author: George Stephanis
8	Author URI: http://Stephanis.info
9	License: GPLv2 or later
10	*/
11
12	class google_tag_manager {
13
14	public static function go() {
15	add_filter( 'admin_init', array( __CLASS__, 'register_fields' ) );
16	add_action( 'wp_footer', array( __CLASS__, 'print_tag' ) );
17	}
18	public static function register_fields() {
19	register_setting( 'general', 'google_tag_manager_id', 'esc_attr' );
20	add_settings_field( 'google_tag_manager_id', '<label for="google_tag_manager_id">' . __( 'Google Tag Manager ID' , 'google_tag_manager' ) . '</label>' , array( __CLASS__, 'fields_html') , 'general' );
21	}
22	public static function fields_html() {
23	?>
24	<input type="text" id="google_tag_manager_id" name="google_tag_manager_id" placeholder="ABC-DEFG" class="regular-text code" value="<?php echo get_option( 'google_tag_manager_id', '' ); ?>" />
25	<p class="description"><?php _e( 'The ID from Google’s provided code (as emphasized):', 'google_tag_manager' ); ?><br />
26	<code><noscript><iframe src="//www.googletagmanager.com/ns.html?id=<strong style="color:#c00;">ABC-DEFG</strong>"</code></p>
27	<p class="description"><?php _e( 'You can get yours <a href="https://www.google.com/tagmanager/">here</a>!', 'google_tag_manager' ); ?></p>
28	<?php
29	}
30	public static function print_tag() {
31	if( ! $id = get_option( 'google_tag_manager_id', '' ) ) return;
32	?>
33	<!-- Google Tag Manager -->
34	<noscript><iframe src="//www.googletagmanager.com/ns.html?id=<?php echo $id; ?>"
35	height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
36	<script>(function(w,d,s,l,i){w[l]=w[l]\|\|[];w[l].push({'gtm.start':
37	new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
38	j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
39	'//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
40	})(window,document,'script','dataLayer','<?php echo $id; ?>');</script>
41	<!-- End Google Tag Manager -->
42	<?php
43	}
44	}
45
46	google_tag_manager::go();