<script>

        function Name(){

            var name = $("#name").val();

            if(name=="") {

                $("#tip1").html("<div style='color:#2ca9cc;font-size:14px;'>请输入用户名</div>");

            }

        }

        function checkName(){

            var name = $("#name").val();

            if(name==""){

                $("#tip1").html("<div style='color:red;font-size:14px;'>用户名不能为空</div>");

            }else{

                $("#tip1").html("");

            }

        }

        function Password(){

            var name = $("#password").val();

            if(name=="") {

                $("#tip2").html("<div style='color:#2ca9cc;font-size:14px;'>请输入密码</div>");

            }

        }

        function checkPassword(){

            var name = $("#password").val();

            if(name==""){

                $("#tip2").html("<div style='color:red;font-size:14px;'>密码不能为空</div>");

            }else{

                $("#tip2").html("");

            }

        }

        function Email(){

            var name = $("#email").val();

            if(name=="") {

                $("#tip3").html("<div style='color:#2ca9cc;font-size:14px;'>请输入邮箱</div>");

            }

        }

        function checkEmail(){

            var name = $("#email").val();

            var zheng =/^[\w\.]+@[\w\.]+(\.\w+)+$/;

            if(!zheng.test(name)){

                $("#tip3").html("<div style='color:red;font-size:14px;'>邮箱格式错误</div>");

            }else{

                $("#tip3").html("");

            }

        }

        function Phone(){

            var name=$("#phone").val().length;

            if( name ==0) {

                $("#tip4").html("<div style='color:#2ca9cc;font-size:14px;'>请输入手机号</div>");

            }

        }

        function checkPhone(){

            var name=$("#phone").val().length;

            if(name!==11) {

                $("#tip4").html("<div style='color:red;font-size:14px;'>手机号位数不正确</div>");

            }else{

                $("#tip4").html("");

            }

        }

        function check(){

                $.ajax({

                    url: "./checkajax.php",

                    type: "post",

                    data:$('form').serialize(),

                    success: function (response) {

                        if (response == 1) {

                            $("#tip").html("用户名不能为空");

                        } else if (response == 2) {

                            $("#tip").html("密码不能为空");

                        } else if (response == 3) {

                        $("#tip").html("注册成功");

                        } else {

                            $("#tip").html("注册失败");

                        }

                    }

                });

            }

    </script>

<?php

$pdo = new PDO("mysql:host=localhost;dbname=project",

    "root","");

//对收集到数据进行验证

if($_POST){

    //判断用户是否进行了数据提交

    $username = isset($_POST["username"])?$_POST["username"]:'';

    if($username==""){

        echo 1;  //response值为1 表示用户名为空

        exit;

    }

    $password = isset($_POST["password"])?$_POST["password"]:'';

    if($password==""){

        echo 2; //response值为2 表示密码为空

        exit;

    }

    $email = isset($_POST["email"])?$_POST["email"]:'';

    $phone = isset($_POST["phone"])?$_POST["phone"]:'';

    //将数据放入到数据库

    $query = "insert into user

             (username,password,email,phone)

              values

             (:username,:password,:email,:phone)";

    //PDO通知mysql做准备

    $statm = $pdo->prepare($query);

    //绑定参数

    $statm->bindParam(":username",$username);

    $statm->bindParam(":password",$password);

    $statm->bindParam(":email",$email);

    $statm->bindParam(":phone",$phone);

    //PDOStatement通知mysql执行

    $statm->execute();

    //根据被影响行数，判断执行是否成功

    if($statm->rowCount()>0){

        //执行成功

        echo 3;

    }else{

        echo 4;//执行失败

    }

}