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Cron: Make response flushing optional #12222

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Cron: Make response flushing optional #12222

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Cron: Make response flushing optional
aldavigdis Jun 18, 2026
764ad5d
Switching see PHPDoc tags to link
aldavigdis Jun 18, 2026
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16 changes: 10 additions & 6 deletions src/wp-cron.php
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Original file line number Diff line number Diff line change
Expand Up @@ -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' ) ) {
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24 changes: 24 additions & 0 deletions src/wp-includes/default-constants.php
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Expand Up @@ -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 );
}
}

/**
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