注册成功代码是可以运行的，就是注册验证手机号是否被注册的时候老是报代码错误
这是前端代码：
<body>
<div class="bg">
<img src="bg_img.jpg" style="width:100%;height:100%;">
<div class="Forms">
<div class="Forms_box">
<div class="Forms_head">
<a class="a1">快速注册</a>
<a class="a2 active">快速登录</a>
</div>
<div class="submit ">
<form action="signup.php" method="POST" class="Form1" id="Form1" onsubmit="return check()">
<span>账号 : </span><input class="input1" type="username" name="signup_userName" onblur="signupusername()" required placeholder="请输入手机号">
<p class="text1">手机号码有误</p><p class="text2"></p>
<span>密码 : </span><input class="input2" type="password" name="signup_passWord" onblur="signuppassword()" required placeholder="请输入密码">
<p class="text">密码必须由6-12位数字加字母组成</p>
<p class="yz">
<span>验证码 :</span>
<input type ="text" id="text" class="yz_text" required placeholder="请输入验证码">
<input type="button" id="code" onclick="Code()" title='点击更换验证码' >
</p>
<input class="sub1" type="submit" value="立即注册">
</form>
</div>
<div class="submit action">
<form action="login.php" method="POST">
<span>账号 : </span><input class="input3" type="text" name="login_userName" required placeholder="请输入手机号" >
<span>密码 : </span><input class="input4" type="password" name="login_passWord" required placeholder="请输入密码">
<input class="sub2" type="submit" value="立即登录">
</form>
</div>
</div>
</div>
</div>
<script src="js/jquery-2.1.1.min.js"></script>
<script src="form.js" charset="utf-8"></script>
</body>
这是php代码，正在这里就是错误：
<?php
$con = mysqli_connect('localhost', 'root', 'root','bdm256727651_db');
if(!$con )
{
die('连接失败: ' . mysqli_error($con));
}
$signup_userName=$_POST["signup_userName"];
mysqli_select_db($con,'bdm256727651_db');
$username = "select userName FROM forms where userName = '{$signup_userName}' ";
$result = mysqli_query($con,$username );
$rows=mysqli_num_rows($result);
$con->set_charset('UTF-8');
if($rows){
echo "手机号已注册";
exit;
}else{
echo " ";
exit;
}
mysqli_close($con)
?>
还有一个也是php注册成功代码：
<?php
$con = mysqli_connect('localhost', 'root', 'root','bdm256727651_db');
if(!$con )
{
die('连接失败: ' . mysqli_error($con));
}
$signup_userName=$_POST["signup_userName"];
$signup_passWord=$_POST["signup_passWord"];
$con->set_charset('UTF-8');
mysqli_select_db($con,'bdm256727651_db');
$sql=" INSERT INTO forms (userName, passWord)
VALUES('{$signup_userName}','{$signup_passWord}') ";
mysqli_query($con,$sql);
echo "<script>window.location.href='signup.html';</script>";
mysqli_close($con)
?>
