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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.
This hook occurs 2 times in this file.
Line | Code |
---|---|
334 | * |
335 | * At the time of this action, the only recourse is to redirect somewhere |
336 | * and exit. If you want to declare a particular network, do so earlier. |
337 | * |
338 | * @since 4.4.0 |
339 | * |
340 | * @param string $domain The domain used to search for a network. |
341 | * @param string $path The path used to search for a path. |
342 | */ |
343 | do_action( 'ms_network_not_found', $domain, $path ); |
344 |
|
345 | return false; |
346 | } elseif ( $path === $current_site->path ) { |
347 | $current_blog = get_site_by_path( $domain, $path ); |
348 | } else { |
349 | // Search the network path + one more path segment (on top of the network path). |
350 | $current_blog = get_site_by_path( $domain, $path, substr_count( $current_site->path, '/' ) ); |
351 | } |
352 | } else { |
Line | Code |
362 |
|
363 | // The network declared by the site trumps any constants. |
364 | if ( $current_blog && $current_blog->site_id != $current_site->id ) { |
365 | $current_site = WP_Network::get_instance( $current_blog->site_id ); |
366 | } |
367 |
|
368 | // No network has been found, bail. |
369 | if ( empty( $current_site ) ) { |
370 | /** This action is documented in wp-includes/ms-settings.php */ |
371 | do_action( 'ms_network_not_found', $domain, $path ); |
372 |
|
373 | return false; |
374 | } |
375 |
|
376 | // During activation of a new subdomain, the requested site does not yet exist. |
377 | if ( empty( $current_blog ) && wp_installing() ) { |
378 | $current_blog = new stdClass; |
379 | $current_blog->blog_id = $blog_id = 1; |
380 | $current_blog->public = 1; |