spawn_cron( int $gmt_time )
通过不停止页面加载的HTTP请求发送运行cron的请求。
Sends a request to run cron through HTTP request that doesn’t halt page loading.
目录锚点:#参数#源码
参数 | 类型 | 说明 |
$gmt_time |
(int) |
Unix时间戳(UTC)。默认值0(使用当前时间)。 |
/**
* Send request to run cron through HTTP request that doesn't halt page loading.
*
* @since 2.1.0
*/
function spawn_cron( $gmt_time = 0 ) {
if ( ! $gmt_time )
$gmt_time = microtime( true );
if ( defined('DOING_CRON') || isset($_GET['doing_wp_cron']) )
return;
/*
* Get the cron lock, which is a unix timestamp of when the last cron was spawned
* and has not finished running.
*
* Multiple processes on multiple web servers can run this code concurrently,
* this lock attempts to make spawning as atomic as possible.
*/
$lock = get_transient('doing_cron');
if ( $lock > $gmt_time + 10 * MINUTE_IN_SECONDS )
$lock = 0;
// don't run if another process is currently running it or more than once every 60 sec.
if ( $lock + WP_CRON_LOCK_TIMEOUT > $gmt_time )
return;
//sanity check
$crons = _get_cron_array();
if ( !is_array($crons) )
return;
$keys = array_keys( $crons );
if ( isset($keys[0]) && $keys[0] > $gmt_time )
return;
if ( defined( 'ALTERNATE_WP_CRON' ) && ALTERNATE_WP_CRON ) {
if ( ! empty( $_POST ) || defined( 'DOING_AJAX' ) || defined( 'XMLRPC_REQUEST' ) ) {
return;
}
$doing_wp_cron = sprintf( '%.22F', $gmt_time );
set_transient( 'doing_cron', $doing_wp_cron );
ob_start();
wp_redirect( add_query_arg( 'doing_wp_cron', $doing_wp_cron, wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
echo ' ';
// flush any buffers and send the headers
while ( @ob_end_flush() );
flush();
WP_DEBUG ? include_once( ABSPATH . 'wp-cron.php' ) : @include_once( ABSPATH . 'wp-cron.php' );
return;
}
// Set the cron lock with the current unix timestamp, when the cron is being spawned.
$doing_wp_cron = sprintf( '%.22F', $gmt_time );
set_transient( 'doing_cron', $doing_wp_cron );
/**
* Filter the cron request arguments.
*
* @since 3.5.0
*
* @param array $cron_request_array {
* An array of cron request URL arguments.
*
* @type string $url The cron request URL.
* @type int $key The 22 digit GMT microtime.
* @type array $args {
* An array of cron request arguments.
*
* @type int $timeout The request timeout in seconds. Default .01 seconds.
* @type bool $blocking Whether to set blocking for the request. Default false.
* @type bool $sslverify Whether SSL should be verified for the request. Default false.
* }
* }
*/
$cron_request = apply_filters( 'cron_request', array(
'url' => add_query_arg( 'doing_wp_cron', $doing_wp_cron, site_url( 'wp-cron.php' ) ),
'key' => $doing_wp_cron,
'args' => array(
'timeout' => 0.01,
'blocking' => false,
/** This filter is documented in wp-includes/class-http.php */
'sslverify' => apply_filters( 'https_local_ssl_verify', false )
)
) );
wp_remote_post( $cron_request['url'], $cron_request['args'] );
}
更新版本 |
源码位置 |
使用 |
被使用 |
5.1.0 |
wp-includes/cron.php |
12 |
5 |
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