spawn_cron( int $gmt_time )
Sends a request to run cron through HTTP request that doesn’t halt page loading.
Description Description
Parameters Parameters
- $gmt_time
-
(int) (Optional) Unix timestamp (UTC). Default 0 (current time is used).
Return Return
(bool) True if spawned, false if no events spawned.
Source Source
File: wp-includes/cron.php
function spawn_cron( $gmt_time = 0 ) { if ( ! $gmt_time ) { $gmt_time = microtime( true ); } if ( defined( 'DOING_CRON' ) || isset( $_GET['doing_wp_cron'] ) ) { return false; } /* * 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 false; } //sanity check $crons = wp_get_ready_cron_jobs(); if ( empty( $crons ) ) { return false; } $keys = array_keys( $crons ); if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) { return false; } if ( defined( 'ALTERNATE_WP_CRON' ) && ALTERNATE_WP_CRON ) { if ( 'GET' !== $_SERVER['REQUEST_METHOD'] || defined( 'DOING_AJAX' ) || defined( 'XMLRPC_REQUEST' ) ) { return false; } $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 true; } // 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', $doing_wp_cron ); /** * Filters the cron request arguments. * * @since 3.5.0 * @since 4.5.0 The `$doing_wp_cron` parameter was added. * * @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. * } * } * @param string $doing_wp_cron The unix timestamp of the cron lock. */ $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-wp-http-streams.php */ 'sslverify' => apply_filters( 'https_local_ssl_verify', false ), ), ), $doing_wp_cron ); $result = wp_remote_post( $cron_request['url'], $cron_request['args'] ); return ! is_wp_error( $result ); }
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Changelog Changelog
Version | Description |
---|---|
5.1.0 | Return values added. |
2.1.0 | Introduced. |