<div id="reg">
  <label>用户名:<input type="text" id="username" /></label><label></label><br /><br />
  <label>密码:<input type="password" id="passw" /></label><br /><br />
  <label>确认密码:<input type="password" id="repassw" /></label><br /><br />
  <label>邮箱:<input type="text" id="email" /></label><br /><br />
  <button id="btn">注册</button>
  <span id="user"></span>
  <span id="pass"></span>
  <span id="rep"></span>
  <span id="em"></span>
 </div>

#reg{width:400px;height: 300px;position: relative;margin:10px auto}
  #reg label{float:right;position: relative;margin-top: 10px;font-size: 28px;}
  #reg label input{width:250px;height: 40px;font-size: 24px;}
  #reg #btn{width:120px;height: 40px;position: absolute;right: 65px;margin-top: 80px;}
  #reg span{width:200px;position: absolute;right: -210px;font-size: 24px;}
  #reg #user{top:20px;}
  #reg #pass{top:75px;}
  #reg #rep{top:130px;}
  #reg #em{top:185px;}
  .error{color:red;}
  .ok{color:greenyellow;}

 <script src="/UploadFiles/2021-04-02/ajax.js">

<"/^\\w{6,16}$/",$username) == 0)
  $res[] = 1;
 else
  $res[] = 0;
 if(empty($username))
  $res[] = 1;
 else
  $res[] = 0;
 if(verifyData($username,'用户名')) //验证该用户名是否被注册了
  $res[] = 1;
 else
  $res[] = 0;
 return $res;
}

/**
 * @function 验证密码是否非法和密码强度
 * @param $passw 密码
 * @return $res 密码强度
 */
function verifyPassw($passw)
{

 $reg1 = '/^[0-9]{8,16}$/'; //纯数字
 $reg2 = '/^[a-zA-Z]{8,16}$/';//纯字母
 $reg3 = '/^[a-zA-Z\+]{8,16}$/';//纯字母+
 $reg4 = '/^[0-9a-zA-Z]{8,16}$/';//数字和字母组合
 $reg5 = '/^[0-9a-zA-Z\+]{8,16}$/';//数字、'+‘和字母组合
 $res;
 if(empty($passw))
  $res = -1;
 else if(preg_match($reg1,$passw))
  $res = 1;
 else if(preg_match($reg2,$passw))
  $res = 1;
 else if(preg_match($reg3,$passw))
  $res = 2;
 else if(preg_match($reg4,$passw))
  $res = 2;
 else if(preg_match($reg5,$passw))
  $res = 3;
 else
  $res = 0; //非法密码
 return $res;
}

/**
 * @function 验证邮箱是否非法和是否已经被注册使用
 * @param $email 邮箱
 * @return $res 错误代码
 */
function verifyEmail($email)
{

 $reg = '/^([\w-*\.*])+@(\w-"连接数据库失败");
 //2.验证数据是否存在
 $sql = "select $query from login where $query = '{$data}'";
 $res = $db->query($sql);
 $row = $res->fetch_assoc();
 //3.关闭数据库
 $db->close();
 return is_null($row)"连接数据库失败");
 //2.插入数据
 $sql = "insert into login values('{$data[0]}','{$data[1]}','{$data[2]}')";
 $res = $db->query($sql);
 //3.关闭数据库
 $db->close();
 return $res;
}




regProcess.php代码


<"Content-Type:text/html;charset=utf-8");
//禁用缓存,是为了数据一样的前提下还能正常提交，而不是缓存数据
header("Cache-Control:no-cache");
include('myFunc.php'); //包含我的函数库
$username = isset($_POST['username'])"username":"请输入用户名","state":"false"}';
else if($res1[0])
 $info.='{"username":"用户名非法","state":"false"}';
else if($res1[2])
 $info.='{"username":"用户名已存在","state":"false"}';
else
{
 $info.='{"username":"用户名可用","state":"true"}';
 ++$isSucceed;
}
$info.=',';
//2.验证密码是否非法和强度
$res2 = verifyPassw($passw);
if($res2 == -1)
 $info.='{"passw":"请输入密码","state":"false"}';
else if($res2 == 0)
 $info.='{"passw":"密码非法","state":"false"}';
else
{
 if($res2 == 1)
 $info.='{"passw":"密码强度较弱","state":"true"}';
 else if($res2 == 2)
 $info.='{"passw":"密码强度中等","state":"true"}';
 else if($res2 == 3)
 $info.='{"passw":"密码强度较强","state":"true"}';
 ++$isSucceed;
}

$info.=',';

//3.确认密码
if(empty($repassw))
 $info.='{"repassw":"请先输入密码","state":"false"}';
else if($passw == $repassw)
{
 $info.='{"repassw":"密码一致","state":"true"}';
 ++$isSucceed;
}
else
 $info.='{"repassw":"密码不一致","state":"false"}';
$info.=',';

//4.验证邮箱
$res3 = verifyEmail($email);
if($res3 == -1)
 $info.='{"email":"请输入邮箱","state":"false"}';
else if($res3 == 0)
 $info.='{"email":"邮箱非法","state":"false"}';
else if($res3 == 1)
 $info.='{"email":"此邮箱已被注册","state":"false"}';
else if($res3 == 2)
{
 $info.='{"email":"此邮箱可用","state":"true"}';
 ++$isSucceed;
}
//保存用户注册信息
if($isSucceed == 4)
 saveRegInfo(array($username,$passw,$email));
echo $info.=']';




这个例子虽然简单吧，但是还是可以让新手大概了解一下前端是怎么传数据给后端的，后端又是怎么返回数据给前端的.
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。