1<?php
  2/**
  3 * Sets up the default filters and actions for Multisite.
  4 *
  5 * If you need to remove a default hook, this file will give you the priority
  6 * for which to use to remove the hook.
  7 *
  8 * Not all of the Multisite default hooks are found in ms-default-filters.php
  9 *
 10 * @package WordPress
 11 * @subpackage Multisite
 12 * @see default-filters.php
 13 * @since 3.0.0
 14 */
 15
 16add_action( 'init', 'ms_subdomain_constants' );
 17
 18// Functions.
 19add_action( 'update_option_blog_public', 'update_blog_public', 10, 2 );
 20add_filter( 'option_users_can_register', 'users_can_register_signup_filter' );
 21add_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' );
 22
 23// Users.
 24add_filter( 'wpmu_validate_user_signup', 'signup_nonce_check' );
 25add_action( 'init', 'maybe_add_existing_user_to_blog' );
 26add_action( 'wpmu_new_user', 'newuser_notify_siteadmin' );
 27add_action( 'wpmu_activate_user', 'add_new_user_to_blog', 10, 3 );
 28add_action( 'wpmu_activate_user', 'wpmu_welcome_user_notification', 10, 3 );
 29add_action( 'after_signup_user', 'wpmu_signup_user_notification', 10, 4 );
 30add_action( 'network_site_new_created_user', 'wp_send_new_user_notifications' );
 31add_action( 'network_site_users_created_user', 'wp_send_new_user_notifications' );
 32add_action( 'network_user_new_created_user', 'wp_send_new_user_notifications' );
 33add_filter( 'sanitize_user', 'strtolower' );
 34add_action( 'deleted_user', 'wp_delete_signup_on_user_delete', 10, 3 );
 35
 36// Roles.
 37add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 );
 38
 39// Blogs.
 40add_filter( 'wpmu_validate_blog_signup', 'signup_nonce_check' );
 41add_action( 'wpmu_activate_blog', 'wpmu_welcome_notification', 10, 5 );
 42add_action( 'after_signup_site', 'wpmu_signup_blog_notification', 10, 7 );
 43add_filter( 'wp_normalize_site_data', 'wp_normalize_site_data', 10, 1 );
 44add_action( 'wp_validate_site_data', 'wp_validate_site_data', 10, 3 );
 45add_action( 'wp_insert_site', 'wp_maybe_update_network_site_counts_on_update', 10, 1 );
 46add_action( 'wp_update_site', 'wp_maybe_update_network_site_counts_on_update', 10, 2 );
 47add_action( 'wp_delete_site', 'wp_maybe_update_network_site_counts_on_update', 10, 1 );
 48add_action( 'wp_insert_site', 'wp_maybe_transition_site_statuses_on_update', 10, 1 );
 49add_action( 'wp_update_site', 'wp_maybe_transition_site_statuses_on_update', 10, 2 );
 50add_action( 'wp_update_site', 'wp_maybe_clean_new_site_cache_on_update', 10, 2 );
 51add_action( 'wp_initialize_site', 'wp_initialize_site', 10, 2 );
 52add_action( 'wp_initialize_site', 'wpmu_log_new_registrations', 100, 2 );
 53add_action( 'wp_initialize_site', 'newblog_notify_siteadmin', 100, 1 );
 54add_action( 'wp_uninitialize_site', 'wp_uninitialize_site', 10, 1 );
 55add_action( 'update_blog_public', 'wp_update_blog_public_option_on_site_update', 1, 2 );
 56
 57// Site meta.
 58add_action( 'added_blog_meta', 'wp_cache_set_sites_last_changed' );
 59add_action( 'updated_blog_meta', 'wp_cache_set_sites_last_changed' );
 60add_action( 'deleted_blog_meta', 'wp_cache_set_sites_last_changed' );
 61add_filter( 'get_blog_metadata', 'wp_check_site_meta_support_prefilter' );
 62add_filter( 'add_blog_metadata', 'wp_check_site_meta_support_prefilter' );
 63add_filter( 'update_blog_metadata', 'wp_check_site_meta_support_prefilter' );
 64add_filter( 'delete_blog_metadata', 'wp_check_site_meta_support_prefilter' );
 65add_filter( 'get_blog_metadata_by_mid', 'wp_check_site_meta_support_prefilter' );
 66add_filter( 'update_blog_metadata_by_mid', 'wp_check_site_meta_support_prefilter' );
 67add_filter( 'delete_blog_metadata_by_mid', 'wp_check_site_meta_support_prefilter' );
 68add_filter( 'update_blog_metadata_cache', 'wp_check_site_meta_support_prefilter' );
 69
 70// Register nonce.
 71add_action( 'signup_hidden_fields', 'signup_nonce_fields' );
 72
 73// Template.
 74add_action( 'template_redirect', 'maybe_redirect_404' );
 75add_filter( 'allowed_redirect_hosts', 'redirect_this_site' );
 76
 77// Administration.
 78add_action( 'after_delete_post', '_update_posts_count_on_delete', 10, 2 );
 79add_action( 'delete_post', '_update_blog_date_on_post_delete' );
 80add_action( 'transition_post_status', '_update_blog_date_on_post_publish', 10, 3 );
 81add_action( 'transition_post_status', '_update_posts_count_on_transition_post_status', 10, 3 );
 82
 83// Counts.
 84add_action( 'admin_init', 'wp_schedule_update_network_counts' );
 85add_action( 'update_network_counts', 'wp_update_network_counts', 10, 0 );
 86foreach ( array( 'wpmu_new_user', 'make_spam_user', 'make_ham_user' ) as $action ) {
 87	add_action( $action, 'wp_maybe_update_network_user_counts', 10, 0 );
 88}
 89
 90// These counts are handled by wp_update_network_counts() on Multisite:
 91remove_action( 'admin_init', 'wp_schedule_update_user_counts' );
 92remove_action( 'wp_update_user_counts', 'wp_schedule_update_user_counts' );
 93
 94foreach ( array( 'make_spam_blog', 'make_ham_blog', 'archive_blog', 'unarchive_blog', 'make_delete_blog', 'make_undelete_blog' ) as $action ) {
 95	add_action( $action, 'wp_maybe_update_network_site_counts', 10, 0 );
 96}
 97unset( $action );
 98
 99// Files.
100add_filter( 'wp_upload_bits', 'upload_is_file_too_big' );
101add_filter( 'import_upload_size_limit', 'fix_import_form_size' );
102add_filter( 'upload_mimes', 'check_upload_mimes' );
103add_filter( 'upload_size_limit', 'upload_size_limit_filter' );
104add_action( 'upload_ui_over_quota', 'multisite_over_quota_message' );
105
106// Mail.
107add_action( 'phpmailer_init', 'fix_phpmailer_messageid' );
108
109// Disable somethings by default for multisite.
110add_filter( 'enable_update_services_configuration', '__return_false' );
111if ( ! defined( 'POST_BY_EMAIL' ) || ! POST_BY_EMAIL ) { // Back compat constant.
112	add_filter( 'enable_post_by_email_configuration', '__return_false' );
113}
114if ( ! defined( 'EDIT_ANY_USER' ) || ! EDIT_ANY_USER ) { // Back compat constant.
115	add_filter( 'enable_edit_any_user_configuration', '__return_false' );
116}
117add_filter( 'force_filtered_html_on_import', '__return_true' );
118
119// WP_HOME and WP_SITEURL should not have any effect in MS.
120remove_filter( 'option_siteurl', '_config_wp_siteurl' );
121remove_filter( 'option_home', '_config_wp_home' );
122
123// Some options changes should trigger site details refresh.
124add_action( 'update_option_blogname', 'clean_site_details_cache', 10, 0 );
125add_action( 'update_option_siteurl', 'clean_site_details_cache', 10, 0 );
126add_action( 'update_option_post_count', 'clean_site_details_cache', 10, 0 );
127add_action( 'update_option_home', 'clean_site_details_cache', 10, 0 );
128
129// If the network upgrade hasn't run yet, assume ms-files.php rewriting is used.
130add_filter( 'default_site_option_ms_files_rewriting', '__return_true' );
131
132// Allow multisite domains for HTTP requests.
133add_filter( 'http_request_host_is_external', 'ms_allowed_http_request_hosts', 20, 2 );
134