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Redirect posts to canonical URL when accessed via secondary category URL slugs
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<?php | |
/* | |
Plugin Name: Redirect to Canonical | |
Description: Redirect posts to canonical URL when accessed via secondary category URL slugs. | |
Version: 1.0 | |
Author: Greg Perham | |
License: GPL2 | |
*/ | |
defined( 'ABSPATH' ) || exit; | |
/* https://wordpress.stackexchange.com/questions/19290/how-can-i-force-wordpress-to-redirect-to-canonical-permalinks#answer-410192 */ | |
add_action( 'template_redirect', 'r2c_canonical_redirect' ); | |
function r2c_canonical_redirect() { | |
if ( is_singular( 'post' ) ) { | |
global $wp; | |
$wp->parse_request(); | |
$current_url = trim( home_url( $wp->request ), '/' ); | |
$canonical = wp_get_canonical_url(); | |
$surl = trim( $canonical, '/' ); | |
if ( $current_url != $surl ) { | |
wp_redirect( $canonical, 301 ); | |
exit; | |
} | |
} | |
} |
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