JS代码部分

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    <script type="text/javascript">
        window.history.replaceState(null, null, window.location.href);//防止F5表单刷新
                function tijiao() {
                    $.ajax({
                        type: "POST",
                        url: "{:url('login/reg_ajax')}",
                        data: $('#ajax_form').serialize(),
                        success: function(result) {
                            alert(result);
                        },
                        error: function(result) {
                            alert(result);
                        }
                    });
                }
    </script>

html表单部分

<form onsubmit="return false" action="###" method="post" id="ajax_form">
            <div class="loginbox bg-white">
                <div class="loginbox-title">注册管理员账号</div>
                <div class="loginbox-textbox">
                    <input value="" class="form-control" placeholder="账号" name="user" type="text">
                </div>
                <div class="loginbox-textbox">
                    <span class="input-icon icon-right">
                        <input class="form-control" placeholder="密码" id="password" name="password" type="password">
                        <i class="fa fa-eye-slash see-password"></i>
                    </span>
                </div>
                <script type="text/javascript">
                $('.see-password').click(function() {
                    if ($('#password').attr('type') == 'password') {
                        $('#password').attr('type', 'text');
                    } else {
                        $('#password').attr('type', 'password');
                    }
                })
                </script>
                <div class="loginbox-textbox">
                    <input class="form-control" placeholder="真实姓名" name="name" type="text">
                </div>
                <div class="loginbox-submit">
                    <input class="btn btn-primary btn-block" type="submit" onclick="tijiao()" value="登录">
                </div>
                <p class="text-center">有账号？ <a href="{:url('login/index')}">登录</a> </p>
            </div>
        </form>

php接收部分

$config = db('config')->where('name','sys_code')->find();
		$data = [
			'user' => input('user'), 
			'password' => md5($config['value'].input('password')),
			'name' => input('name'),
			'lasttime' => time(),
			'addtime' => time(),
		];
		if (db('user')->insert($data) != false) {
			$result = "注册成功";
		}else{
			$result = "注册失败";
		}

		return $result;