php - how to add google analytics code in template

Solution:

Add this javascript

var script = document.createElement("script");
    
    
    script.innerHTML = "your analytics code";
    
    // Append to head
    
    document.head.appendChild(script);

try this not sure if it will work though , another way if u get string from get_header() and append gtag part before loading in your page like this :

  $header = str_get_html(get_header());
    $gtag  = "<script>
    gtag('event', 'conversion', {'send_to': '*********************'});
   </script>";



 $header->find('head', 0)->innertext = $gtag.$header->find('head', 0)->innertext;

reference https://stackoverflow.com/a/18187111/8719734

Solution:

Add Below code in function.php solved my problem.

 add_action( 'wp_head', 'wpsites_add_tracking_code' );
 function wpsites_add_tracking_code() {
    if ( is_page(200) ) {
       echo'<div class="tracking-code">add your tracking code here.</div>';
    } 
  }