queue-it-ab-test.php

<?php 
/*
Plugin Name: A/B Test Google
Description: https://forum.pagelines.com/topic/40638-adding-experiment-tracking-code/
Version: 1.0
Author: Queue-It
*/

class QueueItGA {
  
  function __construct() {
    add_action( 'wp_head', array( $this, 'header_scripts' ), 10 );
  }
  
  function header_scripts() {
    
    if( is_page( array( 15081, 695 ) ) ) :
      ?>
        <!-- Google Analytics Content Experiment code -->

        <!-- End of Google Analytics Content Experiment code -->
      <?php
    else:
      ?>
        <!-- Google Analytics Content Experiment code -->

        <!-- End of Google Analytics Content Experiment code -->
      <?php
    endif;
  }
}
new QueueItGA;