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logowanie safest cryptocurrency exchange

From asdasd, 1 Month ago, written in HTML5.
URL https://pastebin.pl/view/0dcda37b
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  1. <?php
  2.  
  3. $mysql = mysqli_connect("localhost", "root", "", "lazowski");
  4.  
  5. if (isset($_POST['login']) ) {
  6.     $login = $_POST['login'];
  7.     $haslo = $_POST['haslo'];
  8.  
  9.     $query = mysqli_query($mysql, "select * from uzytkownicy where login = \"" . $login . "\" and haslo = \"".md5($haslo)."\";");
  10.    
  11.     if(mysqli_fetch_array($query))
  12.     {
  13.         echo "Zalogowano";
  14.         mysqli_query($mysql, "update uzytkownicy set data_ost_log=NOW() where login = \"" . $login . "\"");
  15.     } else {
  16.         echo "Błędne dane";
  17.     }
  18. }
  19.  
  20. mysqli_close($mysql);
  21. ?>
  22.  
  23. <!DOCTYPE html>
  24. &lt;html&gt;
  25. &lt;head&gt;
  26.     &lt;title&gt;Formularz logowania&lt;/title&gt;
  27. &lt;/head&gt;
  28. &lt;body&gt;
  29.     <h2>Logowanie</h2>
  30.     &lt;form method="post" acti&gt;
  31.         Login: &lt;input type="text" name="login"&gt;&lt;br>
  32.         Hasło: &lt;input type="haslo" name="haslo"&gt;&lt;br>
  33.         &lt;input type="submit" value="Zaloguj"&gt;
  34.     &lt;/form&gt;
  35. &lt;/body&gt;
  36. &lt;/html&gt;
  37.  

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