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。

<?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 $this->db->fetch_next();
	}
	//自定义分页查询{支持多表}
	public function mylistinfo($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：
 

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