phpcmsv9多表联合查询分页功能实现

phpcms v9里面自带的listinfo分页函数蛮好用的，可惜啊。不支持多表查询并分页。

看了一下前台模板层支持get标签，支持多表查询，支持分页。刚好可以把这个功能搬到后台来使用。

我们现在对get_model.class.php进行改造使他能支持多表查询并分页，分享给大家

<?php
defined('IN_PHPCMS') or exit('No permission resources.');
pc_base::load_sys_class('model', '', 0);
class get_model extends model {
    public $db_config, $db_setting;
    public function __construct($db_config = array(), $db_setting = '') {
        if (!$db_config) {
            $this->db_config = pc_base::load_config('database');
        } else {
            $this->db_config = $db_config;
        }
        if (!$db_setting) {
            $this->db_setting = 'default';
        } else {
            $this->db_setting = $db_setting;
        }
        parent::__construct();
        if ($db_setting && $db_config[$db_setting]['db_tablepre']) {
            $this->db_tablepre = $db_config[$db_setting]['db_tablepre'];
        }
    }
    public function sql_query($sql) {
        if (!empty($this->db_tablepre)) $sql = str_replace('phpcms_', $this->db_tablepre, $sql);
        return parent::query($sql);
    }
    public function fetch_next() {
        return $this->db->fetch_next();
    }
    //自定义分页查询{支持多表}
    public function multi_listinfo($where = '', $page = 1, $pagesize = 20, $key='', $setpages = 10,$urlrule = '',$array = array()) {
        $sql = preg_replace('/select([^from].*)from/i', "SELECT COUNT(*) as count FROM ", $where);
        $this->sql_query($sql);
        $c = $this->fetch_next();
        $this->number = $c['count'];
        $page = max(intval($page), 1);
        $offset = $pagesize*($page-1);
        $this->pages = pages($this->number, $page, $pagesize, $urlrule, $array, $setpages);
        $r = $this->sql_query($where.' LIMIT '.$offset.','.$pagesize);
        while(($s = $this->fetch_next()) != false){
            $data[] = $s;
        }
        return $data;
    }
}
?>

使用方法和listinfo一样：

$this->get_db = pc_base::load_model('get_model');
$page = intval($_GET['page']);
$infos = $this->get_db->muti_listinfo($where,$page);
$pages = $this->get_db->pages;

本文转自：http://www.chanyinkeji.com/phpcms-jiaocheng/10.html