我正在尝试用我的多站点的服务器 cron 替换 WordPress cron。看来我必须为每个站点添加一个 cron 条目，这可能是管理方面的噩梦。相反，我想运行一个为每个子站点调用 cron 的 cron 作业。下面是一个插件脚本，但出现错误 500。错误消息具有误导性且不正确，因为它说明了有关未安装 ffmpeg 的内容（没有其他错误消息）。有人可以帮我纠正这个吗？该插件在 GitHub (https://github.com/chibani/wp_multisite_cron) 中，但我认为这会为社区提供一个很棒的插件。谢谢你的帮助！
register_activation_hook(__FILE__, array('wp_multisite_cron','plugin_activation'));
add_action('init', array('wp_multisite_cron', 'init'));
class wp_multisite_cron{
const LANG = 'wp_multisite_cron';
const LANG_DIR = '/lang/';
/**
*
* Plugin activation (sets default parameters)
*/
public static function plugin_activation(){
if(!self::get_option('concurrent_crons'))
self::update_option('concurrent_crons', 100);
}
/**
*
* The main 'loader'
*/
public static function init() {
//Setup the translation
load_plugin_textdomain(self::LANG, false, dirname(plugin_basename( __FILE__ ) ) . self::LANG_DIR);
//The multisite cron action
add_action('wp_ajax_wp_multisite_cron_call', array('wp_multisite_cron','cron_call'));
add_action('wp_ajax_nopriv_wp_multisite_cron_call', array('wp_multisite_cron','cron_call'));
// admin actions and hooks
if (is_admin()) {
self::admin_hooks();
}
}
/**
*
* The admin hooks
*/
public static function admin_hooks(){
//Setting menu
add_action('admin_menu', array('wp_multisite_cron', 'admin_menu'));
if(is_network_admin() && self::is_ready()){
add_action('network_admin_menu', array('wp_multisite_cron', 'network_admin_menu'));
}
}
/**
*
* Set up the admin menu(s)
*/
public static function admin_menu(){
add_options_page("WordPress multisite cron, information page", "WP multisite cron", 'manage_options', 'wp_multisite_cron_settings', array('wp_multisite_cron', "admin_settings"));
}
/**
*
* Set up the admin menu(s)
*/
public static function network_admin_menu(){
add_submenu_page("settings.php","WordPress multisite cron, information page", "WP multisite cron", 'manage_options', 'wp_multisite_cron_settings', array('wp_multisite_cron', "admin_settings"));
}
/**
*
* The admin settings page
*/
public static function admin_settings(){
?>
<div class="wrap">
<div id="icon-options-general" class="icon32">
<br />
</div>
<h2>WordPress multisite cron</h2>
<?php if (isset($_POST['wp_multisite_cron']) && !empty($_POST['wp_multisite_cron'])) :
if (isset($_POST['_wpnonce']) && wp_verify_nonce( $_POST['_wpnonce'], plugin_basename( __FILE__ ) )) :
self::delete_option('concurrent_crons');
foreach($_POST['wp_multisite_cron'] as $option_name=>$option_value){
self::update_option($option_name, $option_value);
}
?>
<div id="setting-error-settings_updated" class="updated settings-error">
<p>
<strong><?php _e('Settings saved.')?></strong>
</p>
</div>
<?php else: ?>
<div id="message" class="error fade">
<p><?php _e('Unable to update settings.',self::LANG)?></p>
</div>
<?php endif;?>
<?php endif;?>
<?php if(!is_multisite()):?>
<div class="tool-box error">
<h3><?php _e('Multisite',self::LANG) ?></h3>
<p><?php _e('Your WordPress installation is not configured as multisite',self::LANG) ?>.</p>
<p><?php _e("Read the WordPress' documentation about multisite to learn how to set up multisite",self::LANG)?> : <a href="http://codex.wordpress.org/Create_A_Network" target="_blank"><?php _e('here',self::LANG)?></a></p>
</div>
<?php endif;?>
<?php if(!defined('DISABLE_WP_CRON') || !DISABLE_WP_CRON ):?>
<div class="tool-box error">
<h3><?php _e('WordPress default cron system',self::LANG) ?></h3>
<p><?php _e('You must disable the WordPress cron system, to use this extension',self::LANG) ?>.</p>
<p><?php _e('Add the following code in your wp-config.php',self::LANG) ?> :</p>
<p>
<code>define('DISABLE_WP_CRON', true);</code>
</p>
</div>
<?php endif;?>
<form action="" method="post">
<table class="form-table">
<tbody>
<tr valign="top">
<th scope="row">
<label for="concurrent_crons"><?php _e('Concurrent crons',self::LANG) ?></label><br />
<em><?php _e("Lower it if some of your sites' cron don't run",self::LANG)?></em>
</th>
<td>
<input type="text" name="wp_multisite_cron[concurrent_crons]" id="concurrent_crons" value="<?php echo self::get_option('concurrent_crons') ?>" />
</td>
</tr>
</tbody>
</table>
<p class="submit">
<input class="button-primary" name="plugin_ok" value="<?php _e('Save settings',self::LANG) ?>" type="submit" />
</p>
<?php wp_nonce_field( plugin_basename( __FILE__ ), '_wpnonce' );?>
</form>
<?php if(self::is_ready()): ?>
<div class="tool-box">
<h3><?php _e('Set-up WordPress multisite cron',self::LANG) ?></h3>
<p><?php _e('Add the following line in your crontab',self::LANG)?> :</p>
<p>
<code>*/15 *<?php echo "\t" ?>* * * www-data /usr/bin/wget -qO- <?php echo admin_url('admin-ajax.php','http').'?action=wp_multisite_cron_call' ?></code>
</p>
</div>
<?php endif;?>
</div>
<?php
}
/**
*
* Check wether the config is ok to run real crons
*/
public static function is_ready(){
return (is_multisite() && defined('DISABLE_WP_CRON') && DISABLE_WP_CRON);
}
/**
*
* The real cron
*/
public static function cron_call(){
//load the blogs id
$blogs = self::get_blogs_id();
if(count($blogs)){
$mh = curl_multi_init();
$length = self::get_option('concurrent_crons');
$offset = 0;
//Cut the
while($blogs_slice = array_slice($blogs,$offset,$length)){
$offset += $length;
foreach($blogs_slice as &$blog_id){
switch_to_blog($blog_id);
$cron_url = site_url().'/wp-cron.php?doing_wp_cron';
//Add the url to the stack
$chs[$blog_id]=curl_init();
curl_setopt($chs[$blog_id], CURLOPT_URL, $cron_url);
curl_setopt($chs[$blog_id], CURLOPT_HEADER, 0);
curl_multi_add_handle($mh, $ch);
}
//Launch :)
$running = null;
do{
curl_multi_exec($mh, $still_running);
}while($still_running > 0);
curl_multi_close($mh);
}
}
die();
}
/**
*
* Get the blog_id for each active blog in the multisite
* @return array
*/
public static function get_blogs_id(){
global $wpdb;
//Get the blogs' ids for blogs that are public and active
$blogs = $wpdb->get_col('SELECT blog_id FROM '.$wpdb->blogs.' WHERE public=1 AND deleted=0');
return $blogs;
}
/**
*
* Get a plugin's specific option
* @param string $option_name
*/
public static function get_option($option_name){
return get_option('wp_multisite_cron_'.$option_name);
}
/**
*
* Set a plugin's specific option
* @param unknown_type $option_name
*/
public static function update_option($option_name,$option_value){
return update_option('wp_multisite_cron_'.$option_name,$option_value);
}
/**
*
* Delete a plugin's specific option
* @param string $option_name
*/
public static function delete_option($option_name){
return delete_option('wp_multisite_cron_'.$option_name);
}
/**
*
* get the plugin's path url
*/
public static function get_plugin_url(){
return get_bloginfo('url') . '/' . PLUGINDIR . '/' . dirname(plugin_basename(__FILE__));
}
}