MySQL - Code

\begin{lstlisting}
POST http://localhost/david/20241109/form20241109.php HTTP/1.1
host: localhost
Cookie: form20241109003=Ich bin das zweite Keks
Content-Length: 43
Content-Type: application/x-www-form-urlencoded

form20241109001=Ich bin das Date fuer heute

Trying ::1...
Connected to localhost.
Escape character is '^]'.
HTTP/1.1 200 OK
Date: Sat, 09 Nov 2024 07:13:09 GMT
Server: Apache/2.4.62 (Debian)
Set-Cookie: PHPSESSID=aooagsmr92b5s71gfvus85cvh5; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Set-Cookie: form20241109002=dies%20ist%20das%20erste%20Keks; expires=Sat, 09 Nov 2024 07:46:29 GMT; Max-Age=2000
Vary: Accept-Encoding
Content-Length: 228
Content-Type: text/html; charset=UTF-8


<form method="POST" action="./form20241109.php">
<input type="text" name="form20241109001"></input>
<input type="submit">
</form>

aooagsmr92b5s71gfvus85cvh5<br>
Ich bin das Date fuer heute<br>
<br>
Ich bin das zweite Keks<br>

<?php
session_start ();
?>

<form method="POST" action="./form20241109.php">
<input type="text" name="form20241109001"></input>
<input type="submit">
</form>

<?php
echo session_id () . "<br>\n";

setcookie ("form20241109002", "dies ist das erste Keks", time () + 2000);

echo htmlentities ($_POST ["form20241109001"]) . "<br>\n";
echo htmlentities ($_COOKIE ["form20241109002"]) . "<br>\n";
echo htmlentities ($_COOKIE ["form20241109003"]) . "<br>\n";

session_destroy ();
?>

<?php
session_start ();

include ("/home/david/MySQLTEST.php");

$db = new PDO ("mysql: host=localhost", $db_user, $db_password);

$sql = "CREATE DATABASE MySQL20241109; ";
$db->query ($sql);

try {
    $sql = "USE MySQL20241109; ";
    $db->query ($sql);

    $sql = "CREATE TABLE a (x1 INTEGER, x2 INTEGER); CREATE TABLE b (y1 INTEGER, y2 INTEGER); ";
    $db->query ($sql);

    $sql  = "INSERT INTO a (x1, x2) VALUES (0, 0); ";
    $sql .= "INSERT INTO a (x1, x2) VALUES (0, 1); ";
    $sql .= "INSERT INTO a (x1, x2) VALUES (1, 0); ";
    $sql .= "INSERT INTO a (x1, x2) VALUES (1, 1); ";
    $sql .= "INSERT INTO a (x1, x2) VALUES (2, 7); ";
    $sql .= "INSERT INTO b (x1, x2) VALUES (0, 1); ";
    $sql .= "INSERT INTO b (x1, x2) VALUES (1, 0); ";
    $db -> query ($sql);

    $sql = "SELECT x1, x2 FROM a; ";
    $stmt = $db->query ($sql);
    while ($row = $stmt -> fetch ())
        echo $row [0] . ", " . $row [1] . "<br>\n";
    echo "<br>\n\n";
    $sql = "SELECT y1, y2 FROM b; ";
    $stmt = $db->query ($sql);
    while ($row = $stmt -> fetch ())
        echo $row [0] . ", " . $row [1] . "<br>\n";
    echo "<br>\n\n";
    $sql = "SELECT x1, x2, y1, y2 FROM a INNER JOIN b WHERE a.x1 = b.y1; ";
    $stmt = $db->query ($sql);
    while ($row = $stmt -> fetch ())
        echo $row [0] . ", " . $row [1] . ", " . $row [2] . ", " . $row [3] . "<br>\n";
    echo "<br>\n\n";

    $sql = "DROP DATABASE MySQL20241109; ";
    $db->query ($sql);
} catch (Exception $e) {
    $sql = "DROP DATABASE MySQL20241109; ";
    $db->query ($sql);
}

session_destroy ();
?>

0, 0<br>
0, 1<br>
1, 0<br>
1, 1<br>
2, 7<br>
<br>

<br>

<br>