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<?php
/**
* Perform tests to see if WP_Cron is operating as it should.
*
* @package Health Check
*/
// Make sure the file is not directly accessible.
if ( ! defined( 'ABSPATH' ) ) {
die( 'We\'re sorry, but you can not directly access this file.' );
}
/**
* Class Health_Check_WP_Cron
*/
class Health_Check_WP_Cron {
public $schedules;
public $crons;
public $last_missed_cron = null;
public $last_late_cron = null;
private $timeout_missed_cron = null;
private $timeout_late_cron = null;
/**
* Health_Check_WP_Cron constructor.
*/
public function __construct() {
$this->init();
$this->timeout_late_cron = 0;
$this->timeout_missed_cron = - 5 * MINUTE_IN_SECONDS;
if ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) {
$this->timeout_late_cron = - 15 * MINUTE_IN_SECONDS;
$this->timeout_missed_cron = - 1 * HOUR_IN_SECONDS;
}
}
/**
* Initiate the class
*
* @uses wp_get_schedules()
* @uses Health_Check_WP_Cron::get_cron_tasks()
*
* @return void
*/
public function init() {
$this->schedules = wp_get_schedules();
$this->get_cron_tasks();
}
/**
* Populate our list of cron events and store them to a class-wide variable.
*
* Derived from `get_cron_events()` in WP Crontrol (https://plugins.svn.wordpress.org/wp-crontrol)
* by John Blackburn.
*
* @uses _get_cron_array()
* @uses WP_Error
*
* @return void
*/
private function get_cron_tasks() {
$cron_tasks = _get_cron_array();
if ( empty( $cron_tasks ) ) {
$this->crons = new WP_Error( 'no_tasks', __( 'No scheduled events exist on this site.', 'health-check' ) );
return;
}
$this->crons = array();
foreach ( $cron_tasks as $time => $cron ) {
foreach ( $cron as $hook => $dings ) {
foreach ( $dings as $sig => $data ) {
$this->crons[ "$hook-$sig-$time" ] = (object) array(
'hook' => $hook,
'time' => $time,
'sig' => $sig,
'args' => $data['args'],
'schedule' => $data['schedule'],
'interval' => isset( $data['interval'] ) ? $data['interval'] : null,
);
}
}
}
}
/**
* Check if any scheduled tasks have been missed.
*
* Returns a boolean value of `true` if a scheduled task has been missed and ends processing.
* If the list of crons is an instance of WP_Error, return the instance instead of a boolean value.
*
* @uses is_wp_error()
* @uses time()
*
* @return bool|WP_Error
*/
public function has_missed_cron() {
if ( is_wp_error( $this->crons ) ) {
return $this->crons;
}
foreach ( $this->crons as $id => $cron ) {
if ( ( $cron->time - time() ) < $this->timeout_missed_cron ) {
$this->last_missed_cron = $cron->hook;
return true;
}
}
return false;
}
/**
* Check if any scheduled tasks are late.
*
* Returns a boolean value of `true` if a scheduled task is late and ends processing. If the list of
* crons is an instance of WP_Error, return the instance instead of a boolean value.
*
* @return bool|WP_Error true if a cron is late, false if it wasn't. WP_Error if the cron is set to that.
*/
public function has_late_cron() {
if ( is_wp_error( $this->crons ) ) {
return $this->crons;
}
foreach ( $this->crons as $id => $cron ) {
$cron_offset = $cron->time - time();
if (
$cron_offset >= $this->timeout_missed_cron &&
$cron_offset < $this->timeout_late_cron
) {
$this->last_late_cron = $cron->hook;
return true;
}
}
return false;
}
}
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