task of LBT3

2026-01-14 14:01:43 +01:00
parent be93d16a61
commit 19c2ba6e1f
1 changed files with 111 additions and 0 deletions
--- a/Jahr/Kryptologie/caeser-verschluesselung.php
+++ b/Jahr/Kryptologie/caeser-verschluesselung.php
@@ -0,0 +1,111 @@
+<?php
+
+// WIP
+
+// Caesar-Chiffre Funktion
+function caesar($text, $shift) {
+    
+    $textArr = str_split($text, 1);
+    // definition is gewohnheit aus angular
+    $textAscii = [];
+    $resAscii = [];
+    $resArr = [];
+
+    for($i = 0; $i > count($textArr); $i++){
+        // jeder buchstabe des textes wird zum array, 
+        // in dessen ascii zeichen, $resAscii hinzugefügt  
+        array_push($textAscii, ord($textArr[$i]));
+        // verschiebung
+        $resAscii[$i] =+ $shift;
+        // ascii buchstaben werden in ein wort gemacht
+        array_push($resArr, chr($resAscii[$i]));
+    }
+    // aus array ein wort machen
+    $result = implode("", $resArr);
+
+    $yo = print_r($textArr);
+    echo "<pre> $yo </pre>";
+    $yo = print_r($textAscii);
+    echo "<pre> $yo </pre>";
+    $yo = print_r($resAscii);
+    echo "<pre> $yo </pre>";
+    $yo = print_r($resArr);
+    echo "<pre> $yo </pre>";
+
+    return $result;
+}
+
+// Formularverarbeitung
+$output = "";
+$text = "";
+$shift = 0;
+if ($_SERVER["REQUEST_METHOD"] === "POST") {
+    $text = $_POST["text"] ?? "";
+    $shift = intval($_POST["shift"] ?? 0);
+
+    if (isset($_POST["encrypt"])) {
+        $output = caesar($text, $shift);
+    }
+
+    if (isset($_POST["decrypt"])) {
+        $output = caesar($text, -$shift);
+    }
+}
+?>
+
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <title>Caesar Chiffre</title>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            background: #f4f4f4;
+            padding: 30px;
+        }
+        .box {
+            background: white;
+            padding: 20px;
+            max-width: 500px;
+            margin: auto;
+            border-radius: 8px;
+        }
+        textarea, input {
+            width: 100%;
+            padding: 10px;
+            margin-bottom: 10px;
+        }
+        button {
+            padding: 10px 20px;
+            margin-right: 10px;
+        }
+        label{
+            display: block;
+            margin-top: 10px;
+        }
+    </style>
+</head>
+<body>
+
+<div class="box">
+    <h2>Caesar Chiffre</h2>
+
+    <form method="post">
+        <label for="text">Nachricht:</label>
+        <textarea name="text" rows="4"><?= htmlspecialchars($text) ?></textarea>
+
+        <label>Verschiebung:</label>
+        <input type="number" name="shift" min = 1 max = 26 value="<?= htmlspecialchars($shift) ?>">
+        <!--<input type="number" name="shift" value="<?= htmlspecialchars($shift) ?>">-->
+
+        <button type="submit" name="encrypt">Verschlüsseln</button>
+        <button type="submit" name="decrypt">Entschlüsseln</button>
+
+        <label for="result"> Verschlüsselte Nachricht:</label>
+        <textarea name="result" rows="4" readonly><?= htmlspecialchars($output ?: $text) ?></textarea>
+    </form>
+</div>
+
+</body>
+</html>