好久没写原生SQL了，来个添加

好久没写原生SQL了，来个添加
<?php 
if($_POST) {

    header("Content-type: text/html; charset=utf-8");
    
    !empty($_POST['Fruit']) && $fruit=$_POST['Fruit'];
    !empty($_POST['other']) && $fruit=$_POST['other'];
    //数据量链接
    $conn=mysqli_connect("127.0.0.1",'root',"root",'test');
    
    $sql="insert into `test` (`option`) VALUES ('".$fruit."')";
 
    $result=mysqli_query($conn,$sql);
    echo '添加成功！';
}  else {
?>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script>
function showinput()
{
    $("#other").show();
}
</script>
<form action="index.php" method="post"> 
您最喜欢水果？<br /><br /> 
<br /><input name="Fruit" type="radio" value="苹果" />苹果 
<br /><input name="Fruit" type="radio" value="桃子" />桃子  
<br /><input name="Fruit" type="radio" value="香蕉" />香蕉 
<br /><input name="Fruit" type="radio" value="梨" />梨  
<br /><input onclick="showinput();" name="Fruit" type="radio" value="0" />其它  
<div id="other" style="display:none"><input name="other" type="text"  value="" /></div><br>
<input type="submit" value="提交">
</form> 
<?php 
}
?>