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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 |
---|---|
467 | * Filter the canonical redirect URL. |
468 | * |
469 | * Returning false to this filter will cancel the redirect. |
470 | * |
471 | * @since 2.3.0 |
472 | * |
473 | * @param string $redirect_url The redirect URL. |
474 | * @param string $requested_url The requested URL. |
475 | */ |
476 | $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); |
477 |
|
478 | // yes, again -- in case the filter aborted the request |
479 | if ( ! $redirect_url || $redirect_url == $requested_url ) { |
480 | return; |
481 | } |
482 |
|
483 | if ( $do_redirect ) { |
484 | // protect against chained redirects |
485 | if ( !redirect_canonical($redirect_url, false) ) { |