php 用户注册实例代码,适合初学者

时间：2015-01-23 来源：西部数据作者：西部数据

if($_POST[submit]){

   checkusername($_POST[username]);

    if($_SESSION["code"]==$_POST[code])

      {

    $username= str_replace(" ","",$_POST[username]);

    $password=md5($_POST[password].ALL_PS);

    $sql="INSERT INTO `member`.`user_list` (`uid`, `m_id`, `username`, `password`) VALUES (NULL, '$_POST[select]', '$username','$password' )";

    mysql教程_query($sql);

    echo "注册成功";

     }

    else

     {

      echo "验证码错误"."<br>";

      session_destroy();

     }

}

   function checkusername($username)

          {

           $sql2 = "select uid from user_list where username='".mysql_escape_string($username)."'";

            $result = mysql_query($sql2) or die ('ERROR: '.mysql_error());

            if(mysql_num_rows($result)>0)

                {

                echo "该用户名已经存在，请更换！";

                exit();

                 }

            else{

                 echo "<script> location.href='reg.php'</script>";

                 }

           }

?>

<LINK href="common.css" type=text/css rel=stylesheet>

  <form action="" method="post">

  用户名：<input type="text" name="username" style="height:23px" /><br>

  密　码：<input type="password" name="password"  style="height:23px" /><br>

  职  位:

  <select name="select" size="1" style="height:23px" / >

    <option value="1">1</option>

    <option value="2">2</option>

  </select>

  <br/>



  验证码：<input type="code" name="code" size="10" style="height:23px" />

  <img src="imgcode.php">

  <br><br>

  <input type="submit" name="submit" value="注册"/>

  </form>