php 查询数据库返回json数据

// 设置返回json格式数据

header('content-type:application/json;charset=utf8');

//连接数据库

$link = mysql_connect("localhost", "root", "root") or die("Unable to connect to the MySQL!");

mysql_query("SET NAMES 'UTF8'");

mysql_select_db("jilinwula", $link) or die("Unable to connect to the MySQL!");

// 获取分页参数

$page = 0 ;

$pageSize = 3;

if(!is_null($_GET["page"])) {

$page = $_GET["page"];

}

if(!is_null($_GET["pageSize"])) {

$pageSize = $_GET["pageSize"];

}

// 查询数据到数组中

$result = mysql_query("select username,password from userinfo limit " . $page . ", ". $pageSize ."");

$results = array();

while ($row = mysql_fetch_assoc($result)) {

$results[] = $row;

}

// 将数组转成json格式

echo json_encode($results);

// 关闭连接

mysql_free_result($result);

mysql_close($link);