php提交数据给数据库失败

各位大佬！！为什么我将网页上输入的form表单的内容利用PHP接收然后传送到数据时一直添加失败！我哭了我，改了前面许多错之后，最后报一个我填写的内容的周围有错误，错误提示是：添加数据失败You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '女','513023200002210222','1235654@ff.com','12345468768')' at line 1
html部分代码如下

="form-group">
     ="idcard" class="col-sm-2 control-label">身份证号码
    
="col-sm-6">
      ="text"  class="form-control" name ="number" required="required"  placeholder="请输入您的身份证号码">
           ="idspan" style="color: red">
    
  

  
="form-group">
     ="email" class="col-sm-2 control-label">邮箱
    
="col-sm-6">
      ="email" class="form-control" name="email" id="email" required="required" class="form-control"onclick="check(form)"placeholder="请输入您的邮箱">
      ="emailspan" style="color: red">
    
  

    
="form-group">
     ="pnumber" class="col-sm-2 control-label">手机号
    
="col-sm-6">
      ="tel" class="form-control" name="pnumber"required="required" class="form-control"onclick="checkemail()" placeholder="请输入您的手机号">
    
  

  
="form-group">
    
="col-sm-offset-2 col-sm-10">
      ="submit" class="btn btn-default">提交
    
  

php部分代码如下

$servername = "localhost";
$username = "root";
$password = "123456";
$dbname = "news";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
} 

mysqli_select_db($conn,"news");
$sql = "INSERT INTO news_tb3 (name,sex,num,email,pnumber) VALUES('$_POST[name],'$_POST[sex]','$_POST[number]','$_POST[email]','$_POST[pnumber]')";

if(mysqli_query($conn,$sql))
    echo"添加数据成功";
else
    echo"添加数据失败".mysqli_error(($conn));
mysqli_close($conn)
?>

sql语句从女那个地方开始报错，你看看数据库性别字段存得啥，你这里传得字符串是不是数据库是整型还是什么

'$_POST[name]'那里少了个引号