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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
746 | * Filters the canonical redirect URL. |
747 | * |
748 | * Returning false to this filter will cancel the redirect. |
749 | * |
750 | * @since 2.3.0 |
751 | * |
752 | * @param string $redirect_url The redirect URL. |
753 | * @param string $requested_url The requested URL. |
754 | */ |
755 | $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); |
756 |
|
757 | // Yes, again -- in case the filter aborted the request. |
758 | if ( ! $redirect_url || strip_fragment_from_url( $redirect_url ) === strip_fragment_from_url( $requested_url ) ) { |
759 | return; |
760 | } |
761 |
|
762 | if ( $do_redirect ) { |
763 | // Protect against chained redirects. |
764 | if ( ! redirect_canonical( $redirect_url, false ) ) { |