Sql-Injection-Proof-of-Concept
Version vom 7. Oktober 2020, 16:44 Uhr von Thomas.will (Diskussion | Beiträge) (→Unsichere Methode)
Unsichere Methode
<?php if(isset($_POST['submit'])){ //connect db include "inc/connect.php"; //unsafe query $search = $_POST['search']; //Database search $sql = "SELECT * FROM users WHERE username='$search'"; $result = mysqli_query($link, $sql); } ?> <!DOCTYPE html> <html> <body> <h2>SQL Injection</h2> <form method="post"> <label for="fname">Suche</label><br> <input type="text" name="search"><br> <input type="submit" name="submit" value="Suche"> </form> <br> <table border = "1"> <tr> <td>ID</td> <td>Name</td> <td>Passwort</td> </tr> <?php while ($row = mysqli_fetch_row($result)) { echo "<tr>"; echo "<td>".$row[0]." </td>"; echo "<td>".$row[1]." </td>"; echo "<td>".$row[2]." </td><br>"; echo "</tr>"; } ?> </table> </body> </html>
Sichere Methode
<?php if(isset($_POST['submit'])){ //connect db include "inc/connect.php"; //safe query $search = mysqli_real_escape_string($link, $_POST['search']); //Database search $sql = "SELECT * FROM users WHERE username='$search'"; $result = mysqli_query($link, $sql); } ?> <!DOCTYPE html> <html> <body> <h2>SQL Injection</h2> <form method="post"> <label for="fname">Suche</label><br> <input type="text" name="search"><br> <input type="submit" name="submit" value="Suche"> </form> <br> <table border = "1"> <tr> <td>ID</td> <td>Name</td> <td>Passwort</td> </tr> <?php while ($row = mysqli_fetch_row($result)) { echo "<tr>"; echo "<td>".$row[0]." </td>"; echo "<td>".$row[1]." </td>"; echo "<td>".$row[2]." </td><br>"; echo "</tr>"; } ?> </table> </body> </html>