I'm using the code below to do the following task:
If page id is 22834 load a specific facebook pixel script with "Purchased" track event, else (all other pages) load the facebook pixel script with "PageView" track event.
Current code:
function wpb_hook_javascript() {
if (is_page ('22834')) {
?>
<script>!function(f,b,e,v,n,t,s)
{if(f.fbq)return;n=f.fbq=function(){n.callMethod?
n.callMethod.apply(n,arguments):n.queue.push(arguments)};
if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
n.queue=[];t=b.createElement(e);t.async=!0;
t.src=v;s=b.getElementsByTagName(e)[0];
s.parentNode.insertBefore(t,s)}(window, document,'script',
'https://connect.facebook.net/en_US/fbevents.js');
fbq('init', 'XXXXXXXXXX');
fbq('track', 'Purchase');</script><noscript><img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=XXXXXXXXXX&ev=Purchase&noscript=1"></noscript>
<?php else ?>
<script>!function(f,b,e,v,n,t,s)
{if(f.fbq)return;n=f.fbq=function(){n.callMethod?
n.callMethod.apply(n,arguments):n.queue.push(arguments)};
if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
n.queue=[];t=b.createElement(e);t.async=!0;
t.src=v;s=b.getElementsByTagName(e)[0];
s.parentNode.insertBefore(t,s)}(window, document,'script',
'https://connect.facebook.net/en_US/fbevents.js');
fbq('init', 'XXXXXXXXXX');
fbq('track', 'PageView');</script><noscript><img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=XXXXXXXXXX&ev=PageView&noscript=1"></noscript>
<?php
}
}
add_action('wp_head', 'wpb_hook_javascript');
The script is working and applying the code correctly in my website, but with this code in my functions.php the wp-admin area it's showing this error:
There has been a critical error on your website. Please check your site admin email inbox for instructions.
If I remove the code the wp-admin works again!
It's recommended to use wp_enqueue_scripts instead of using wp_head hook for outputing js and css.
You may need to use !is_admin() condition inside your function as well.
You're missing a closing } and opening { before and after your else statement.
function wpb_hook_javascript(){
if (!is_admin() && is_page('22834')) {
?>
<script>
! function(f, b, e, v, n, t, s) {
if (f.fbq) return;
n = f.fbq = function() {
n.callMethod ?
n.callMethod.apply(n, arguments) : n.queue.push(arguments)
};
if (!f._fbq) f._fbq = n;
n.push = n;
n.loaded = !0;
n.version = '2.0';
n.queue = [];
t = b.createElement(e);
t.async = !0;
t.src = v;
s = b.getElementsByTagName(e)[0];
s.parentNode.insertBefore(t, s)
}(window, document, 'script',
'https://connect.facebook.net/en_US/fbevents.js');
fbq('init', 'XXXXXXXXXX');
fbq('track', 'Purchase');
</script><noscript><img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=XXXXXXXXXX&ev=Purchase&noscript=1"></noscript>
<?php } else { ?>
<script>
! function(f, b, e, v, n, t, s) {
if (f.fbq) return;
n = f.fbq = function() {
n.callMethod ?
n.callMethod.apply(n, arguments) : n.queue.push(arguments)
};
if (!f._fbq) f._fbq = n;
n.push = n;
n.loaded = !0;
n.version = '2.0';
n.queue = [];
t = b.createElement(e);
t.async = !0;
t.src = v;
s = b.getElementsByTagName(e)[0];
s.parentNode.insertBefore(t, s)
}(window, document, 'script',
'https://connect.facebook.net/en_US/fbevents.js');
fbq('init', 'XXXXXXXXXX');
fbq('track', 'PageView');
</script><noscript><img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=XXXXXXXXXX&ev=PageView&noscript=1"></noscript>
<?php
}
}
add_action('wp_head', 'wpb_hook_javascript');