Beyler localhost'da sorunu hallettim ama localhost'da Apache server kullaniyorum.

Orijinal Link:

https://pyroautotransport.com/checkout?quote=910fdb10-5a00-11ef-8d4b-6bc2018ed9b6

Temiz Link:

https://pyroautotransport.com/checkout/910fdb10-5a00-11ef-8d4b-6bc2018ed9b6

Localhost'da bunu yapmayi basardim.

functions.php

function custom_checkout_rewrite_rules() {
// Add the first rewrite rule for checkout with quote
    add_rewrite_rule(
'^checkout/([^/]*)/?$', // Regex to match the new URL structure
        'index.php?pagename=checkout&quote=$matches[1]', // Map to the original query var
        'top'
    );

    // Add the second rewrite rule for checkout with vehicle details
    add_rewrite_rule(
'^checkout/([^/]+)/vehicle-details/?$',  // The URL structure to match
        'index.php?pagename=checkout&quote=$matches[1]&step=vehicle-details',  // The WordPress query variables to use
        'top'
    );
}
add_action('init', 'custom_checkout_rewrite_rules');

function add_custom_query_vars($vars) {
// Use a single query var for both purposes
    $vars[] = 'quote';
    $vars[] = 'step';
    return $vars;
}
add_filter('query_vars', 'add_custom_query_vars');

Daha sonra .htaccess dosyasina asagidaki kodu ekledim. hersey calisti diledigim gibi localde.

# Custom Rewrite Rule for Quote Parameter and Vehicle Details
<IfModule mod_rewrite.c>
RewriteEngine On

# Custom rewrite rule to transform /checkout/quote-id/vehicle-details into /checkout/?quote=quote-id&step=vehicle-details
RewriteRule ^checkout/([a-zA-Z0-9-]+)/vehicle-details/?$ /checkout/?quote=$1&step=vehicle-details [L,QSA]

# Existing rewrite rule to transform /checkout/quote-id/ into /checkout/?quote=quote-id
RewriteRule ^checkout/([a-zA-Z0-9-]+)/?$ /checkout/?quote=$1 [L,QSA]

Uzun lafin kisasi, Host'da calismadi.( OPENLITESPEED ) ayni .htaccess dosyasi. hersey ayni.