Ticket #20537: 20537-6-with-filter.patch

src/wp-cron.php

@@ -55 +55 @@
         return $value;
 }
 
-if ( false === $crons = _get_cron_array() )
+if ( false === $crons = _get_cron_array() ) {
         die();
+}
+
+$should_skip  = false;
+$current_site = null;
+if ( is_multisite() ) {
+        $current_site = get_blog_details();
+        // Don't process cron for suspended blogs.
+        if ( $current_site->archived || $current_site->spam || $current_site->deleted ) {
+                $should_skip = true;
+        }
+}
+/** This filter is documented in wp-includes/cron.php */
+if ( true === apply_filters( 'skip_cron_for_site', $should_skip, $current_site ) ) {
+        die();
+}
+unset( $should_skip, $current_site );
 
 $keys = array_keys( $crons );
 $gmt_time = microtime( true );

src/wp-includes/cron.php

@@ -336 +336 @@
  */
 function wp_cron() {
         // Prevent infinite loops caused by lack of wp-cron.php
-        if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false || ( defined('DISABLE_WP_CRON') && DISABLE_WP_CRON ) )
+        if ( strpos( $_SERVER['REQUEST_URI'], '/wp-cron.php' ) !== false || ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) ) {
                 return;
+        }
 
-        if ( false === $crons = _get_cron_array() )
+        if ( false === $crons = _get_cron_array() ) {
                 return;
+        }
+
+        $should_skip  = false;
+        $current_site = null;
+        if ( is_multisite() ) {
+                $current_site = get_blog_details();
+                // Don't process cron for suspended sites.
+                if ( $current_site->archived || $current_site->spam || $current_site->deleted ) {
+                        $should_skip = true;
+                }
+        }
+        /**
+         * Allow to either force skip a cron run or to force cron to run even for suspended sites.
+         *
+         * @since 4.6.0
+         *
+         * @param bool        $should_skip  Whether the cron run is going to be skipped.
+         *                                  Will be `false` for single-site or non-suspended site within multi-site
+         *                                  or `true` for suspended sites.
+         *                                  Sites are regarded as suspended if they are either archived, marked
+         *                                  as spam or marked as deleted.
+         *                                  Set to `false` to force cron to run or `true` to force cron to quit.
+         * @param null|object $current_site The WP_Site object for which cron will run or null if not in
+         *                                  multi-site.
+         */
+        if ( true === apply_filters( 'skip_cron_for_site', $should_skip, $current_site ) ) {
+                return;
+        }
+        unset( $should_skip, $current_site );
 
         $gmt_time = microtime( true );
         $keys = array_keys( $crons );