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A simple php user login module

WBOY
Release： 2016-07-25 08:59:20
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  6. 登陆系统
  9. session_start();
  10. if ($_SESSION[username]) {
  11. ?>
    22. 当前用户
  23. }else {
  24. ?>
    39. 用户
    密码
  44. }
  45. ?>
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2，config.php

  2. $dbhost="localhost";
  3. $dbuser="root";
  4. $dbpassword="123456";
  5. $dbname="auth";
  6. $conn=mysql_connect("$dbhost","$dbuser","$dbpassword") or die('不能连接服务器'.mysql_error());
  7. mysql_select_db("$dbname",$conn) or die("数据库访问错误".mysql_errno());
  8. mysql_query("set names gb2312");
  9. ?>
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3，userlogin.php

  6. 登陆系统_bbs.it-home.org
  9. session_start();
  10. require("config.auth.php");
  11. if ($_POST[submit]) {
  12. $sql="select * from userinfo where username = '$_POST[username]' and password = '$_POST[password]'";
  13. $result=mysql_query($sql);
  14. $numrows=mysql_num_rows($result);
  15. if ($numrows == 1) {
  16. $row=mysql_fetch_assoc($result);
  17. $_SESSION[username]=$row[username];
  18. //echo $_SESSION[username];
  19. echo "<script>alert('登陆成功！');window.location.href='left.php';</script>";
  20. }else {
  21. echo "
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