jq ajax提交

post前端部分(ajax)

<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<form>
    <p><label for="user">姓名：<input type="text" name="user" id="user"></label></p>
    <p><label for="password">密码：<input type="password" name="password" id="password"></label></p>
    <button onclick="ajax()" type="button">提交</button> //type='button'才能ajax
</form>
//post提交
<script>
    function ajax(){
        //serialize() 获取所有能填写的数据的input等
        $.post('/demo.php',$('form').serialize(),function(reg){
            if(reg.code>0){
                console.log(reg.msg);
            }else{
                console.log(reg.msg);
            }
        },'json')
    }
</script>

post后端部分(ajax)

class users
{
    public function show()
    {
        $user = $_POST['user'];
        $password = $_POST['password'];
        if($user !== 'admin'){
            $date = json_encode(['code'=>1; 'msg'=>'账户不正确']); //转换json数组，才可返回
            die($date);
        }
        if($password !== '123456'){
            $date = json_encode(['code'=>1; 'msg'=>'密码错误']);
            die($date);
        }
        $date = json_encode(['code'=>0; 'msg'=>'登陆成功']);
        die($date);
    }
}
$user = new users;
$user->show();

get前端部分(ajax)

<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<form>
    <p><label for="user">姓名：<input type="text" name="user" id="user"></label></p>
    <p><label for="password">密码：<input type="password" name="password" id="password"></label></p>
    <button onclick="ajax()" type="button">提交</button> //type='button'才能ajax
</form>
//post提交
<script>
    function ajax(){
        //serialize() 获取所有能填写的数据的input等
        //$.get('/demo.php?user=user&password=password',function(reg){},'json')
        $.get('/demo.php',$('form').serialize(),function(reg){
            if(reg.code>0){
                console.log(reg.msg);
            }else{
                console.log(reg.msg);
            }
        },'json')
    }
</script>

get后端部分(ajax)

class users
{
    public function show()
    {
        $user = $_GET['user'];
        $password = $_GET['password'];
        if($user !== 'admin'){
            $date = json_encode(['code'=>1; 'msg'=>'账户不正确']); //转换json数组，才可返回
            die($date);
        }
        if($password !== '123456'){
            $date = json_encode(['code'=>1; 'msg'=>'密码错误']);
            die($date);
        }
        $date = json_encode(['code'=>0; 'msg'=>'登陆成功']);
        die($date);
    }
}
$user = new users;
$user->show();