+$doing_cron_transient = get_transient( 'doing_cron');
+
+// Use global $doing_wp_cron lock otherwise use the GET lock. If no lock, trying grabbing a new lock.
+if ( empty( $doing_wp_cron ) ) {
+ if ( empty( $_GET[ 'doing_wp_cron' ] ) ) {
+ // Called from external script/job. Try setting a lock.
+ if ( $doing_cron_transient && ( $doing_cron_transient + WP_CRON_LOCK_TIMEOUT > $gmt_time ) )
+ return;
+ $doing_cron_transient = $doing_wp_cron = sprintf( '%.22F', microtime( true ) );
+ set_transient( 'doing_cron', $doing_wp_cron );
+ } else {
+ $doing_wp_cron = $_GET[ 'doing_wp_cron' ];
+ }
+}
+
+// Check lock
+if ( $doing_cron_transient != $doing_wp_cron )
+ return;
+
+foreach ( $crons as $timestamp => $cronhooks ) {
+ if ( $timestamp > $gmt_time )