使用PHP处理数据库数据如何将数据返回客户端并显示当前状态_php实例
php处理大量数据，每处理一个数据返回客户端显示当前状态的方法。
类似于dedecms生成静态页
想法:
1.客户端发送请求
2.服务器端接受请求，开始统计所需处理的数据量
3.将所需处理数据按一定规则排列，发送到服务器处理端
4.服务器处理端处理了第一个数据，将处理结果经过一定处理后发送给客户端
5.客户端接收到结果，自动将处理结果显示并发送到服务器
6.服务器接收到处理结果 将它转发到服务器处理端
7.处理端继续处理结果...
8.循环4-7步骤，直到处理完毕
实验过程：
1.创建数据库和表
create databases handle; create table user( id int unsigned not null auto_increment primary key, name varchar(8), sex tinyint(1) default '1', score int not null, state tinyint(1) );
2.向表中添加数据（不示例）
3.创建index.html客户端，a.php服务端1，b.php服务端2
Index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>客户端</title>
</head>
<body>
<button onclick="send('a.php?state=0')">开始请求</button>
<div style="position: fixed;width: 500px;height: 300px;top: 100px;background: gray">
<span style="color: white;font-size: 20px;"></span>
</div>
<script type="text/javascript" src="./jquery-1.10.2.min.js"></script>
<script type="text/javascript">
//创建一个模态框
function display(value){
$('span').html(value);
}
//ajax
function send(dizhi){
$.ajax({
type: "get",
url: dizhi,
success: function(msg){
var arr=JSON.parse(msg);
console.log(arr);
//alert(arr.value);
var tishi="已经处理 "+arr.now +"个，共"+arr.all+"个";
display(tishi);
if(arr.now!=arr.all){
send("a.php?now="+arr.now+"&all="+arr.all);
}else{
alert("完成!");
}
}
});
}
</script>
</body>
</html> a.php:
<?php
require('./dbconfig.php');
$link=mysql_connect(HOST,USER,PASS) or die('数据库链接失败');
mysql_select_db(DBNAME);
/*
查询数据
$sql="select * from user";
$result=mysql_query($sql);
$row=mysql_fetch_assoc($result);
var_dump($row);
*/
/*
循环插入
for($i=3;$i<=100;$i++){
$sql= "insert into user(name,score,state) values('z".$i."',".$i.",1)";
mysql_query($sql);
}
*/
/*查询需要处理的数据总数*/
//isset($_GET['state'])?$_GET['state']:0;
if(isset($_GET['state'])){
$sql="select count(*) from user";
$result=mysql_query($sql);
$all=mysql_result($result,0);
$now=0;
header("Location: b.php?all={$all}&now=0");
}else{
header("Location: b.php?all={$_GET['all']}&now={$_GET['now']}");
}
/*返回当前处理的数据*/ b.php:
<?php
require('./dbconfig.php');
$link=mysql_connect(HOST,USER,PASS) or die('数据库链接失败');
mysql_select_db(DBNAME);
/*返回当前处理的数据*/
//$id=$_GET['id'];//获取将要处理的id
$now=$_GET['now'];//已经处理的个数
$all=$_GET['all'];//总共要处理的个数
$sql="select score from user limit {$now},1";
$result=mysql_query($sql);
$value=mysql_result($result, 0);
$now++;
$arr=array(
'now'=>$now,
'all'=>$all,
'value'=>$value
);
//print_r($arr);
echo json_encode($arr); dbconfig.php:
<?php
define('HOST','127.0.0.1');
define('USER', 'root');
define('PASS','root');
define('DBNAME','handle'); 以上所述是小编给大家分享的使用PHP处理数据库数据如何将数据返回客户端并显示当前状态，希望对大家有所帮助！
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