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Canonical API to handle WordPress Redirecting Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference" by Mark Jaquith

File Size:	560 lines (24 kb)
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Defines 5 functions

  redirect_canonical()
  lowercase_octets()
  _remove_qs_args_if_not_in_url()
  redirect_guess_404_permalink()
  wp_redirect_admin_locations()

Functions

Functions that are not part of a class:

redirect_canonical( $requested_url = null, $do_redirect = true ) X-Ref

Redirects incoming links to the proper URL based on the site url.

Search engines consider www.somedomain.com and somedomain.com to be two
different URLs when they both go to the same location. This SEO enhancement
prevents penalty for duplicate content by redirecting all incoming links to
one or the other.

Prevents redirection for feeds, trackbacks, searches, comment popup, and
admin URLs. Does not redirect on non-pretty-permalink-supporting IIS 7+,
page/post previews, WP admin, Trackbacks, robots.txt, searches, or on POST
requests.

Will also attempt to find the correct link when a user enters a URL that does
not exist based on exact WordPress query. Will instead try to parse the URL
or query in an attempt to figure the correct page to go to.

param: string $requested_url Optional. The URL that was requested, used to
param: bool $do_redirect Optional. Redirect to the new URL.
return: null|false|string Null, if redirect not needed. False, if redirect

lowercase_octets($matches) X-Ref

No description

_remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $url ) X-Ref

Removes arguments from a query string if they are not present in a URL
DO NOT use this in plugin code.

return: string The altered query string

redirect_guess_404_permalink() X-Ref

Attempts to guess the correct URL based on query vars

return: bool|string The correct URL if one is found. False on failure.

wp_redirect_admin_locations() X-Ref

No description

/wp-includes/ -> canonical.php (summary)

Defines 5 functions