Replace SEO title tag with dynamically generated value

I have a page that pulls data from amazon product api and return the data for a category, baseed on the category ID.

The script runs in a hook whitch outputs the data in a page from a custom post type (labeled amazon) I created for the purpose

Everything works as expected except that I want the Name of that category to replace the <title> tag of that post type.

Here is where I am stuck

In the script that calls the amazon. api, at some point, I retrieve the value of the category title:

$newtitle = $Category_Title_From_Json_Response;

Then I store the value in a global variable so it can be accessed from other scripts. (suggestions from chatGPT)

global $custom_document_title;
$custom_document_title = $newtitle;

Then In my functions.php file, still suggested by chatGPT, I have this code:

add_filter( 'pre_get_document_title', function( $title ) {
// Access the global variable containing the dynamic title.
global $custom_document_title;

if ( is_singular( 'amazon' ) && isset( 
   $custom_document_title ) ) {
   
  // $newtitle = "My custom title"; // This works 
    $newtitle = $custom_document_title; // This does not pick the value and returns NULL :-(



} else {
    // Otherwise, use the default title.
    $newtitle = $title;
}

return $newtitle;

}, 999, 1 );

So, how can I pass the value of $newtitle from the hook to the filter?

I hope this makes sense ??

Thank You already

• This topic was modified 1 year, 7 months ago by Giu.
• This topic was modified 1 year, 7 months ago by Giu.
• This topic was modified 1 year, 7 months ago by Giu.

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