php+mysql会员系统的开发
if($_POST[submit]){
$username = str_replace(" ","",$_POST[username]);
$sql="select * from user_list where 'username' = '$usernmae'";
$query=mysql_query($sql);
$us=is_array($row=mysql_fetch_array($query));
$ps=$us?md5($_POST[password].ALL_PS)==$row[password]:false;
if($ps){
$_SESSION[uid]=$row[uid];
$_SESSION[user_shell]=md5($row[username].$row[password].ALL_PS);
}
}

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