<s>[INST] I'm trying to create a small script that will automatically update the website tracking code (Google Analytics, Facebook Pixel, Pinterest, etc) on all my website pages. 

I can manually update the tracking code on each page individually but that's tedious and time consuming. I have multiple pages with the same tracking codes. 

I can use PHP to update the codes, I'm assuming I'll be able to use regular expressions to find and replace the old code with the new one on each pages content. 

Here is an example of what I have so far:

```php
<?[/INST]