Ticket #10952: update-plugins.php

<?php
function get_plugins($checked = null) {
        $obj = get_transient('sem_update_plugins');

        if ( !is_object($obj) ) {
                $obj = new stdClass;
                $obj->last_checked = false;
                $obj->checked = array();
                $obj->response = array();
        }

        if ( in_array(current_filter(), array('load-plugins.php', 'load-tools_page_sem-tools')) ) {
                $timeout = 3600;
        } else {
                $timeout = 43200;
        }
        
        if ( is_array($checked) && $checked && $obj->checked && $obj->checked != $checked ) {
                delete_transient('sem_update_plugins');
                delete_transient('update_plugins');
                return false;
        }
        
        if ( ( $obj->last_checked >= time() - $timeout ) || $_POST )
                return $obj->response;
        
        global $wp_version;
        
        if ( !function_exists('get_plugins') )
                require_once ABSPATH . 'wp-admin/includes/plugin.php';
        
        $obj->last_checked = time();
        set_transient('sem_update_plugins', $obj);
        
        $url = version_checker_server;
        
        $to_check = get_plugins();
        $check = array();
        
        foreach ( $to_check as $file => $plugin )
                $check[$file] = $plugin['Version'];
        
        $obj->checked = $check;
        set_transient('sem_update_plugins', $obj);
        
        $body = array(
                'check' => $check,
                'locale' => apply_filters('core_version_check_locale', get_locale()),
                );
        
        $options = array(
                'timeout' => 3,
                'body' => $body,
                'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo('url'),
                );
        
        $cache_id = md5(serialize(array($url, $options)));
        $raw_response = wp_cache_get($cache_id, 'sem_api');
        
        if ( $raw_response === false ) {
                $raw_response = wp_remote_post($url, $options);
                wp_cache_set($cache_id, $raw_response, 'sem_api');
        }
        
        if ( is_wp_error($raw_response) )
                set_transient('sem_api_error', $raw_response->get_error_messages());
        else
                delete_transient('sem_api_error');
        
        if ( is_wp_error($raw_response) || 200 != $raw_response['response']['code'] )
                $response = false;
        else
                $response = @unserialize($raw_response['body']);
        
        if ( $response !== false ) { // keep old response in case of error
                $obj->response = $response;
                set_transient('sem_update_plugins', $obj);
        }
        
        return $obj;
}

?>