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    2、登錄檢測(cè)頁(yè)\n <\/p>

      ?? php ??? ????(\"數(shù)據(jù)庫(kù)服務(wù)器連接失敗\");
    1. @mysql_select_db(\"test\") \/\/選擇數(shù)據(jù)庫(kù)mydb <\/li>\n
    2. or die(\"數(shù)據(jù)庫(kù)不存在或不可用\"); <\/li>\n
    3. \/\/獲取用戶輸入 <\/li>\n
    4. $username = $_POST['username']; <\/li>\n
    5. $passcode = $_POST['passcode']; <\/li>\n
    6. \/\/執(zhí)行SQL語(yǔ)句獲得Session的值 <\/li>\n
    7. $query = @mysql_query(\"select username, userflag from users \" <\/li>\n
    8. .\"where username = '$username' and passcode = '$passcode'\") <\/li>\n
    9. ??? ????(\"SQL語(yǔ)句執(zhí)行失敗\"); <\/li>\n
    10. \/\/判斷用戶是否存在,密碼是否正確 <\/li>\n
    11. if($row = mysql_fetch_array($query)) <\/li>\n
    12. { <\/li>\n
    13. session_start(); \/\/??? ?? <\/li>\n
    14. \/\/判斷用戶的權(quán)限信息是否有效,如果為1或0則說(shuō)明有效 <\/li>\n
    15. if($row['userflag'] == 1 ?? $row['userflag'] == 0) <\/li>\n
    16. { <\/li>\n
    17. $_SESSION['??? ??'] = $row['??? ??']; <\/li>\n
    18. $_SESSION['userflag'] = $row['userflag']; <\/li>\n
    19. echo \"歡迎登錄,點(diǎn)擊此處進(jìn)入歡迎界?\"; <\/li>\n
    20. } <\/li>\n
    21. else \/\/如果權(quán)限信息無(wú)效輸流錯(cuò)誤信息 <\/li>\n
    22. { <\/li>\n
    23. echo \"??戶權(quán)限信息不正確\"; <\/li>\n
    24. } <\/li>\n
    25. } <\/li>\n
    26. else \/\/如果用戶name? 密碼不正確,則輸流錯(cuò)誤 <\/li>\n
    27. { <\/li>\n
    28. echo \"??戶name或密碼錯(cuò)誤\"; <\/li>\n
    29. } <\/li>\n
    30. ?><\/li>\n
    31. \n
    32. \n<\/ol>復(fù)代碼<\/div>\n<\/em>?、注銷登錄頁(yè)\n <\/div>\n

      <\/p>\n

      \n
      \n
        unset($_SESSION['??? ??']);
      1. unset($_SESSION['????']);
      2. unset($_SESSION['userflag']);
      3. echo \"注銷成功\";
      4. ?>
      5. \n
      6. \n<\/ol>復(fù)代碼<\/div>\n

        4. ??? ?? ??? ???\n <\/p>\n

        \n
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        1. \n
        2. session_start()
        3. if(isset($_SESSION['username']))
        4. {
        5. @mysql_connect(\"localhost\", \"root\",\"1981427\") \/\/??????? ???? ?? ?????? ??? ???? ???
        6. ?? die(\"?????? ?? ?? ??\")
        7. @mysql_select_db (\"test\" ) \/\/mydb ?????? ??
        8. or die(\"??????? ???? ??? ??? ? ????.\")
        9. \/\/?? ????
        10. $username = $_SESSION['username']; >\/\/SQL ?? ???? userflag
        11. $query = @mysql_query(\"select userflag from users \"
        12. .\"where username = '$username'\")
        13. ?? die(\"SQL ?)? ?? ?????. ?? ??\");
        14. $row = mysql_fetch_array($query);
        15. \/\/?? ??????? ?? ??? ???? Session? ??? ?????. ?? ?? ?? Session ??? ???????.
        16. if($row['userflag'] != $_SESSION['userflag'])
        17. {
        18. $_SESSION['userflag'] = $row['userflag']
        19. }
        20. \/\/Session ?? ?? ?? ?? ??? ??
        21. if($_SESSION['userflag'] == 1)
        22. echo \"Welcome Administrator\".$_SESSION['username'].\"Log in to the system\";
        23. if($_SESSION['userflag'] == 0)
        24. echo \"????? ???\".$_SESSION['username'].\"???? ??????\";
        25. echo \" ????<\/a>\"; <\/li>\n
        26. } <\/li>\n
        27. else <\/li>\n
        28. { <\/li>\n
        29. echo \"??? ??? ????. ? ???\"; <\/li>\n
        30. } <\/li>\n
        31. ?><\/li>\n
        32. \n<\/ol><\/div>?? ??<\/em>\n<\/div><\/em>\n<\/div>\n<\/td><\/tr>\n\n\n<\/table>\n\n
          \n\n<\/div>\n
          \n<\/div>\n
          "}

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          ? ??? ?? PHP ???? PHP? ?? ??? ?? ?

          PHP? ?? ??? ?? ?

          Jul 25, 2016 am 09:05 AM

          1. ???
          2. 復(fù)代碼

            2、登錄檢測(cè)頁(yè)

              ?? php ??? ????("數(shù)據(jù)庫(kù)服務(wù)器連接失敗");
            1. @mysql_select_db("test") //選擇數(shù)據(jù)庫(kù)mydb
            2. or die("數(shù)據(jù)庫(kù)不存在或不可用");
            3. //獲取用戶輸入
            4. $username = $_POST['username'];
            5. $passcode = $_POST['passcode'];
            6. //執(zhí)行SQL語(yǔ)句獲得Session的值
            7. $query = @mysql_query("select username, userflag from users "
            8. ."where username = '$username' and passcode = '$passcode'")
            9. ??? ????("SQL語(yǔ)句執(zhí)行失敗");
            10. //判斷用戶是否存在,密碼是否正確
            11. if($row = mysql_fetch_array($query))
            12. {
            13. session_start(); //??? ??
            14. //判斷用戶的權(quán)限信息是否有效,如果為1或0則說(shuō)明有效
            15. if($row['userflag'] == 1 ?? $row['userflag'] == 0)
            16. {
            17. $_SESSION['??? ??'] = $row['??? ??'];
            18. $_SESSION['userflag'] = $row['userflag'];
            19. echo "歡迎登錄,點(diǎn)擊此處進(jìn)入歡迎界?";
            20. }
            21. else //如果權(quán)限信息無(wú)效輸流錯(cuò)誤信息
            22. {
            23. echo "??戶權(quán)限信息不正確";
            24. }
            25. }
            26. else //如果用戶name? 密碼不正確,則輸流錯(cuò)誤
            27. {
            28. echo "??戶name或密碼錯(cuò)誤";
            29. }
            30. ?>
            復(fù)代碼
            ?、注銷登錄頁(yè)

            ?????:
            密碼:
            ??保存時(shí)間:

          ? ????? ??
          ? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

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