SEO URLs and canonical in OpenCart 4

Question

Having an issue with duplicate pages in Google index.

Same product is accessible via different URLs through categories.

How to properly set up canonical URLs in OpenCart 4?

maria_design · Accepted Answer

Canonical URLs in OpenCart 4 are configured like this:

**1. In header.twig:**

```twig
{% if canonical %}

{% endif %}
```

**2. In controller:**

```php
$data['canonical'] = $this->url->link(
    'product/product',
    'product_id=' . $product_id
);
```

**3. Redirects in .htaccess:**

```apache
RewriteRule ^category-1/(.*)$ /$1 [R=301,L]
```

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