disable_wp_cron - La secuencia de comandos PHP no funciona para reemplazar el cron de WordPress para sitios múltiples

cron wordpress example

Question

Estoy tratando de reemplazar el cron de WordPress con el cron del servidor para mi sitio múltiple. Parece que tengo que agregar una entrada cron para CADA sitio que podría ser una pesadilla de gestión. En cambio, quiero ejecutar un único trabajo cron que llame al cron para cada subsitio. A continuación se muestra un script de complemento, pero obteniendo el error 500. El mensaje de error es engañoso e incorrecto porque dice algo sobre el ffmpeg no instalado (ningún otro mensaje de error). ¿Alguien puede ayudarme a corregir esto? El complemento está en GitHub (https://github.com/chibani/wp_multisite_cron) pero creo que sería un excelente complemento para la comunidad. ¡Gracias por cualquier ayuda!

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__));
    }
}

Answer 1

Dentro de su función cron_call, alrededor de la línea 200, tiene este bloque:

//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);

Así que primero inicializas tus manipuladores curl en la matriz $chs . Entonces, en lugar de usar esos valores, intenta agregar la variable $ch a su controlador múltiple, que es nulo, supongo.

Con la configuración adecuada de informes de errores y comprobando el resultado de curl_multi_add_handle , probablemente podría ver que la operación de agregar controlador falló.

Del manual php :

int curl_multi_add_handle ( resource $mh , resource $ch )

Valores de retorno

Devuelve 0 en caso de éxito o uno de los códigos de error CURLM_XXX.

EDITAR: tal vez no era lo suficientemente claro en la solución, pero debe reemplazar

curl_multi_add_handle($mh, $ch);

con

curl_multi_add_handle($mh, $chs[$blog_id]);