abstract：后臺(tái)代碼： $user = json_decode($_POST['data']); //print_r($_POST);die; $users=[]; $users['email']=$user->email; $users['password']=$user->password; //print_r($users
后臺(tái)代碼：
$user = json_decode($_POST['data']);
//print_r($_POST);die;
$users=[];
$users['email']=$user->email;
$users['password']=$user->password;
//print_r($users);
$arrs=[];
$arrs=[['email'=>'admin@123.php','password'=>'123456'],['email'=>'peter@123.php','password'=>'123456']];
//$arr=['email'=>'admin@123.php','password'=>'123456'];
foreach ($arrs as $arr) {
if ($arr==$users){
echo json_encode(['status'=>1,'msg'=>'登錄成功,正在跳轉(zhuǎn)...']) ;
exit;
}else{
echo json_encode(['status'=>0,'msg'=>'郵箱或密碼錯(cuò)誤,登錄失敗!']) ;
exit;
}
}前臺(tái)代碼：
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div>
<h1>用戶登錄</h1>
<form>
<p>郵箱: <input type="email" name="email"></p>
<p>密碼: <input type="password" name="password"></p>
<p><button type="button">提交</button></p>
</form>
</div>
<script>
var btn=document.getElementsByTagName('button')[0];
btn.onclick=function () {
var xhr=new XMLHttpRequest();
xhr.onreadystatechange=function () {
};
//2.監(jiān)聽(tīng)響應(yīng)狀態(tài)
xhr.onreadystatechange = function(){
if (xhr.readyState === 4) { // 準(zhǔn)備就緒
// 判斷響應(yīng)結(jié)果:
if (xhr.status === 200) {
// 響應(yīng)成功,通過(guò)xhr對(duì)象的responseText屬性可以獲取響應(yīng)的文本,此時(shí)是html文檔內(nèi)容
var p = document.createElement('p'); //創(chuàng)建新元素放返回的內(nèi)容
p.style.color = 'red';
var json = JSON.parse(xhr.responseText);
if (json.status === 1) {
p.innerHTML = json.msg;
} else if (json.status == 0) {
p.innerHTML = json.msg;
}
// 將響應(yīng)文本添加到新元素上
document.forms[0].appendChild(p); // 將新元素插入到當(dāng)前頁(yè)面中
btn.disabled = true;
setTimeout(function(){
document.forms[0].removeChild(p);
btn.disabled = false;
if (json.status == 1) {
location.href = 'admin.php';
}
},2000);
} else {
// 響應(yīng)失敗,并根據(jù)響應(yīng)碼判斷失敗原因
alert('響應(yīng)失敗'+xhr.status);
}
} else {
// http請(qǐng)求仍在繼續(xù),這里可以顯示一個(gè)一直轉(zhuǎn)來(lái)轉(zhuǎn)去的圖片
}
}
//3.設(shè)置請(qǐng)求參數(shù)
xhr.open('post','inc/check.php',true);
//4. 設(shè)置頭信息,將內(nèi)容類型設(shè)置為表單提交方式
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
//4.發(fā)送請(qǐng)求
var data = {
email: document.getElementsByName('email')[0].value,
password: document.getElementsByName('password')[0].value
};
// data = 'email='+data.email+'&password='+data.password;
var data_json=JSON.stringify(data);
xhr.send('data='+data_json);
};
</script>
</body>
</html>
Correcting teacher：查無(wú)此人Correction time：2019-05-16 09:09:55
Teacher's summary：完成的不錯(cuò)，json數(shù)據(jù)可以在不同的編程語(yǔ)言中傳遞數(shù)據(jù)。好好練習(xí)，繼續(xù)加油