PHP 脚本无法为多站点替换 WordPress cron
Posted
技术标签:
【中文标题】PHP 脚本无法为多站点替换 WordPress cron【英文标题】:PHP script not working to replace WordPress cron for multi-site 【发布时间】:2012-08-02 16:34:08 【问题描述】:我正在尝试将 WordPress cron 替换为我的多站点的服务器 cron。看来我必须为每个站点添加一个 cron 条目,这可能是一场管理噩梦。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?该插件位于 GitHub (https://github.com/chibani/wp_multisite_cron) 中,但我认为这会成为社区的绝佳插件。感谢您的帮助!
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__));
【问题讨论】:
如果错误消息表明 ffmpeg 未安装,并且您的脚本与 ffmpeg 无关,则您可能正在查看错误消息。 我刚刚注意到 arrarray_slice 中有一个额外的“r”。当我删除时,错误消失了。该 URL 似乎没有执行。到目前为止,我已将其范围缩小到函数“cron_call”。任何帮助将不胜感激! 我认为你只需要调试它。使用curl_error()
获取调用不运行的确切原因php.net/curl_error ...您的错误报告是否打开?
【参考方案1】:
在你的 cron_call 函数中,大约第 200 行,你有这个块:
//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);
所以首先你在 $chs
数组中初始化你的 curl 处理程序。然后,您尝试将 $ch
变量添加到您的多处理程序中,而不是使用这些值,我认为这是 null。
通过正确的错误报告设置并检查curl_multi_add_handle
的结果,您可能会看到添加句柄操作失败。
来自php manual:
int curl_multi_add_handle ( resource $mh , resource $ch )
返回值
成功时返回 0,或 CURLM_XXX 错误代码之一。
编辑:也许我对解决方案不够清楚,但你需要更换
curl_multi_add_handle($mh, $ch);
与
curl_multi_add_handle($mh, $chs[$blog_id]);
【讨论】:
以上是关于PHP 脚本无法为多站点替换 WordPress cron的主要内容,如果未能解决你的问题,请参考以下文章