<?php

/**

 * A pseudo-cron daemon for scheduling WordPress tasks.

 *

 * WP-Cron is triggered when the site receives a visit. In the scenario

 * where a site may not receive enough visits to execute scheduled tasks

 * in a timely manner, this file can be called directly or via a server

 * cron daemon for X number of times.

 *

 * Defining DISABLE_WP_CRON as true and calling this file directly are

 * mutually exclusive and the latter does not rely on the former to work.

 *

 * The HTTP request to this file will not slow down the visitor who happens to

 * visit when a scheduled cron event runs.

 *

 * @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' );

}

// 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 ( ! empty( $_POST ) || defined( 'DOING_AJAX' ) || defined( 'DOING_CRON' ) ) {

	die();

}

/**

 * Tell WordPress the cron task is running.

 *

 * @var bool

 */

define( 'DOING_CRON', true );

if ( ! defined( 'ABSPATH' ) ) {

	/** Set up WordPress environment */

	require_once __DIR__ . '/wp-load.php';

}

// Attempt to raise the PHP memory limit for cron event processing.

wp_raise_memory_limit( 'cron' );

/**

 * Retrieves the cron lock.

 *

 * Returns the uncached `doing_cron` transient.

 *

 * @ignore

 * @since 3.3.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @return string|int|false Value of the `doing_cron` transient, 0|false otherwise.

 */

function _get_cron_lock() {

	global $wpdb;

	$value = 0;

	if ( wp_using_ext_object_cache() ) {

		/*

		 * Skip local cache and force re-fetch of doing_cron transient

		 * in case another process updated the cache.

		 */

		$value = wp_cache_get( 'doing_cron', 'transient', true );

	} else {

		$row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", '_transient_doing_cron' ) );

		if ( is_object( $row ) ) {

			$value = $row->option_value;

		}

	}

	return $value;

}

$crons = wp_get_ready_cron_jobs();

if ( empty( $crons ) ) {

	die();

}

$gmt_time = microtime( true );

// The cron lock: a unix timestamp from when the cron was spawned.

$doing_cron_transient = get_transient( 'doing_cron' );

// Use global $doing_wp_cron lock, otherwise use the GET lock. If no lock, try to grab 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_wp_cron        = sprintf( '%.22F', microtime( true ) );

		$doing_cron_transient = $doing_wp_cron;

		set_transient( 'doing_cron', $doing_wp_cron );

	} else {

		$doing_wp_cron = $_GET['doing_wp_cron'];

	}

}

/*

 * The cron lock (a unix timestamp set when the cron was spawned),

 * must match $doing_wp_cron (the "key").

 */

if ( $doing_cron_transient !== $doing_wp_cron ) {

	return;

}

foreach ( $crons as $timestamp => $cronhooks ) {

	if ( $timestamp > $gmt_time ) {

		break;

	}

	foreach ( $cronhooks as $hook => $keys ) {

		foreach ( $keys as $k => $v ) {

			$schedule = $v['schedule'];

			if ( $schedule ) {

				$result = wp_reschedule_event( $timestamp, $schedule, $hook, $v['args'], true );

				if ( is_wp_error( $result ) ) {

					error_log(

						sprintf(

							/* translators: 1: Hook name, 2: Error code, 3: Error message, 4: Event data. */

							__( 'Cron reschedule event error for hook: %1$s, Error code: %2$s, Error message: %3$s, Data: %4$s' ),

							$hook,

							$result->get_error_code(),

							$result->get_error_message(),

							wp_json_encode( $v )

						)

					);

					/**

					 * Fires if an error happens when rescheduling a cron event.

					 *

					 * @since 6.1.0

					 *

					 * @param WP_Error $result The WP_Error object.

					 * @param string   $hook   Action hook to execute when the event is run.

					 * @param array    $v      Event data.

					 */

					do_action( 'cron_reschedule_event_error', $result, $hook, $v );

				}

			}

			$result = wp_unschedule_event( $timestamp, $hook, $v['args'], true );

			if ( is_wp_error( $result ) ) {

				error_log(

					sprintf(

						/* translators: 1: Hook name, 2: Error code, 3: Error message, 4: Event data. */

						__( 'Cron unschedule event error for hook: %1$s, Error code: %2$s, Error message: %3$s, Data: %4$s' ),

						$hook,

						$result->get_error_code(),

						$result->get_error_message(),

						wp_json_encode( $v )

					)

				);

				/**

				 * Fires if an error happens when unscheduling a cron event.

				 *

				 * @since 6.1.0

				 *

				 * @param WP_Error $result The WP_Error object.

				 * @param string   $hook   Action hook to execute when the event is run.

				 * @param array    $v      Event data.

				 */

				do_action( 'cron_unschedule_event_error', $result, $hook, $v );

			}

			/**

			 * Fires scheduled events.

			 *

			 * @ignore

			 * @since 2.1.0

			 *

			 * @param string $hook Name of the hook that was scheduled to be fired.

			 * @param array  $args The arguments to be passed to the hook.

			 */

			do_action_ref_array( $hook, $v['args'] );

			// If the hook ran too long and another cron process stole the lock, quit.

			if ( _get_cron_lock() !== $doing_wp_cron ) {

				return;

			}

		}

	}

}

if ( _get_cron_lock() === $doing_wp_cron ) {

	delete_transient( 'doing_cron' );

}

die();