ajax请求出现unexpected end of json input
ajax请求:
$.ajax({
type: "POST",
url: "php/login.php?action=login",
dataType: "json",
data: {"usernum":$usernum,"password":$password},
success: function(data){
var dataJson = JSON.parse(data);
if(dataJson.success==1){
$(".loginBox2").css("display","none");
var div='
$(".left").prepend(div);
}else{
alert(dataJson.msg);
return false;
}
} ,
php代码
<?php
header('Content-type: text/html; charset=utf8');
session_start();
//包含数据库连接文件
include("conn.php");
$action = $_POST["action"];
if($action == "login"){
$usernum = htmlspecialchars($_POST["usernum"]);
$password = MD5($_POST["password"]);
$query = mysql_query("select * from userinfo where usernum='$usernum'");
$result = mysql_fetch_assoc($query);
if ($password == $result["password"] ){
$_SESSION["usernum"] = $result["usernum"];
$_SESSION["username"] = $result["username"];
$arr["success"] = 1;
$arr["username"] = $_SESSION["username"];
}
else {
$arr["success"] = 0;
$arr["msg"]="密码不正确!";
}
echo json_encode($arr);
}
else if($action == "logout"){
unset($_SESSION);
session_destroy();
echo '1';
}
?>