diff --git a/src/wp-cron.php b/src/wp-cron.php
index 417dcce375849..d068f7ab391a8 100644
--- a/src/wp-cron.php
+++ b/src/wp-cron.php
@@ -16,18 +16,22 @@
  * @package WordPress
  */
 
-ignore_user_abort( true );
-
 if ( ! headers_sent() ) {
 	header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
 	header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
 }
 
+if ( defined( 'WP_CRON_IGNORE_ABORT' ) && true === WP_CRON_IGNORE_ABORT ) {
+	ignore_user_abort( true );
+}
+
 // Don't run cron until the request finishes, if possible.
-if ( function_exists( 'fastcgi_finish_request' ) ) {
-	fastcgi_finish_request();
-} elseif ( function_exists( 'litespeed_finish_request' ) ) {
-	litespeed_finish_request();
+if ( defined( 'WP_CRON_FLUSH' ) && true === WP_CRON_FLUSH ) {
+	if ( function_exists( 'fastcgi_finish_request' ) ) {
+		fastcgi_finish_request();
+	} elseif ( function_exists( 'litespeed_finish_request' ) ) {
+		litespeed_finish_request();
+	}
 }
 
 if ( ! empty( $_POST ) || defined( 'DOING_AJAX' ) || defined( 'DOING_CRON' ) ) {
diff --git a/src/wp-includes/default-constants.php b/src/wp-includes/default-constants.php
index acfc878fb7138..ebad0cf4d01ef 100644
--- a/src/wp-includes/default-constants.php
+++ b/src/wp-includes/default-constants.php
@@ -398,6 +398,30 @@ function wp_functionality_constants() {
 	if ( ! defined( 'WP_CRON_LOCK_TIMEOUT' ) ) {
 		define( 'WP_CRON_LOCK_TIMEOUT', MINUTE_IN_SECONDS );
 	}
+
+	/**
+	 * Wether or not to ignore user abort when running wp-cron
+	 *
+	 * @see https://www.php.net/manual/en/function.ignore-user-abort.php
+	 */
+	if ( ! defined( 'WP_CRON_IGNORE_ABORT' ) ) {
+		define( 'WP_CRON_IGNORE_ABORT', true );
+	}
+
+	/**
+	 * Flush wp-cron response data
+	 *
+	 * Wether or not to flush wp-cron response data and close the HTTP request
+	 * before continuing in the background. This invokes a child process in
+	 * PHP-FPM and LSPHP and closes the HTTP connection to the client.
+	 *
+	 * @link https://www.php.net/manual/en/function.ignore-user-abort.php
+	 * @link https://www.php.net/manual/en/function.fastcgi-finish-request.php
+	 * @link https://www.php.net/manual/en/function.litespeed-finish-request.php
+	 */
+	if ( ! defined( 'WP_CRON_FLUSH' ) ) {
+		define( 'WP_CRON_FLUSH', true );
+	}
 }
 
 /**