extjs php 动态分页整理

  分页 很常用，在ext例子中，你按照上面例子 动态分页时往往不成功，我整理了一下，供大家分享：
page.js
Ext.onReady(function(){
var sm = new Ext.grid.CheckboxSelectionModel();
        var cm = new Ext.grid.ColumnModel([
        sm,
        {header:"id",dataIndex:"id"},
        {header:"name",dataIndex:"name"},
        {header:"status",dataIndex:"status"},
        {header:"category",dataIndex:"category"},
        {header:"moviedate",dataIndex:"moviedate"},
        {header:"actors",dataIndex:"actors"},
        ]);
        cm.defaultSortable = true;

        var ds = new Ext.data.Store({
url:"page.php",
            reader: new Ext.data.JsonReader({
                totalProperty: "totalProperty",
                root: "results"
            }, [
            {name: "id",type:'int'},
             'name','status','category','moviedate','actors'
            ])
        });

        var grid = new Ext.grid.GridPanel({
id:'testgrid',
renderTo:'grid-example',
            ds: ds,
            cm: cm,
            sm: sm,
            bbar: new Ext.PagingToolbar({
                pageSize: 2,
                store: ds,
                displayInfo: true,
            }),
            autoWidth:true,
            autoHeight: true
        });
        ds.load({params:{start:0,limit:2}});
});
page.php

<?php
//Not display warning,notice message
error_reporting(0);
//connect db
$link = mysql_pconnect("localhost", "root", "root")
    or die("Could not connect");
mysql_select_db("test") or die("Could not select database");
//get count
$sql_count = "SELECT * FROM movie_info";
//get start and limit
$start = isset($_POST['start']) ? $_POST['start']:0;
$limit = isset($_POST['limit']) ? $_POST['limit']:10;
//generate sql
$sql = $sql_count . " LIMIT ".$start.", ".$limit ;
$rs_count = mysql_query($sql_count);
$rows = mysql_num_rows($rs_count);
$rs = mysql_query($sql);
while($obj = mysql_fetch_object($rs))
{
    $arr[] = $obj;
}
//get result
echo '{"totalProperty":"'.$rows.'","results":'.json_encode($arr).'}';