The rel_canonical WordPress PHP function outputs the rel=”canonical” link tag for singular queries on your website.
Usage
rel_canonical();
Parameters
- None
More information
See WordPress Developer Resources: rel_canonical
Examples
Add rel=”canonical” to singular post templates
If you want to add the rel=”canonical” tag to your single post templates, add the following code to your theme’s header.php file within the <head> tag:
if (is_singular()) {
rel_canonical();
}
Add rel=”canonical” to custom post type templates
To add the rel=”canonical” tag to custom post type templates, add the following code to your theme’s header.php file within the <head> tag:
if (is_singular('your_custom_post_type')) {
rel_canonical();
}
Add rel=”canonical” to custom taxonomy templates
To add the rel=”canonical” tag to custom taxonomy templates, add the following code to your theme’s header.php file within the <head> tag:
if (is_tax('your_custom_taxonomy')) {
rel_canonical();
}
Add rel=”canonical” to specific page templates
To add the rel=”canonical” tag to specific page templates, add the following code to your theme’s header.php file within the <head> tag:
if (is_page_template('your_page_template.php')) {
rel_canonical();
}
Add rel=”canonical” to attachment templates
To add the rel=”canonical” tag to attachment templates, add the following code to your theme’s header.php file within the <head> tag:
if (is_attachment()) {
rel_canonical();
}