Question

运行后没有提示错误 ，可是数据库 表里没有数据插入，哪里错了。

<?php
include"conn/conn.php";
if(isset($_POST["submit"])){
$username=$_POST["username"];
$tel=$_POST["tel"];
$address=$_POST["address"];
$sql="INSERT INTO tb_user(username,tel,address) values ($username,$tel,$address)";

}

?>

Answer 1

include"conn/conn.php";
if(isset($_POST["submit"])){
    $username=$_POST["username"];
    $tel=$_POST["tel"];
    $address=$_POST["address"];
    $sql="INSERT INTO tb_user(username,tel,address) values ($username,$tel,$address)";  
    $result = mysql_query($sql);
    var_dump($result);  
}