【www.gdgbn.com--php入门】

@session_start();
 mysql教程_connect("localhost","root","19860427") or die("database server no exists!");
 mysql_select_db("wk") or die("database error!"); 
 mysql_query("SET NAMES "gbk"");//set document charset encode
  $uid = get_value("u","post");
$login_pwd = get_value("p","post");
if(strlen($uid)<3 || strlen($uid)>12){
 alert("用户长度为3-12个字符!","");
}elseif ( strlen($login_pwd)<6 || strlen($login_pwd)>12 ){
 alert("登录密码不正确,长度为6-12位","");
}else{
 $sql = "select * from wk_member where m_uid="$uid" and m_pass="$login_pwd"";
 $result = mysql_query($sql) or die(mysql_error());
 if(mysql_num_rows($result) ){
  $rs = mysql_fetch_array($result);
  if($rs["m_pass"]!=md5($login_pwd) ){
   alert("用户名与密码不匹配!","");
  }else{
   $_SESSION["uid"]=array($rs["id"],$uid,$rs["m_tel"]);      
   exit("<script>location="registerok.php";</script>");
  }
 }else{
  alert("登陆失败,用户名不存在!","");
 }
}

 

function get_value( $st,$str="get")
{
 if( $str == "post" )
 {
  return $_POST[$st];
 }else{
  return $_GET[$st];
 }
}

  ?>

 
 
 
  用户名
 

   
   
   
  密码

 

   
   
   
 

                                          

 

//数据表wk_member结构
id
m_uid
m_pass

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本文来源：http://www.gdgbn.com/jiaocheng/24181/