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+# Enable PHP in Nginx
+
+run in bash:
+
+```bash
+sudo apt install php-fpm -y
+```
+
+get php version/sock
+
+```bash
+ls -l /run/php/*.sock
+```
+
+add to nginx config (server section):
+
+```nginx
+# pass PHP scripts to FastCGI server
+#
+location ~ \.php$ {
+        include snippets/fastcgi-php.conf;
+        fastcgi_pass unix:/run/php/php8.4-fpm.sock; # <-- use version from output above!
+}
+```
+
+validate nginx configuration & restart if ok:
+
+```bash
+sudo nginx -t
+sudo systemctl reload nginx
+```
+
+create Demo-App:
+
+```bash
+sudo vi /var/www/*domain-name*/*webapp*.php
+```
+
+## Demo Webapp (Addressbook)
+
+```php
+<?php
+// Wir simulieren eine einfache Speicherung in einer Textdatei
+$db_file = 'names.txt';
+
+// 1. Speichern, wenn das Formular abgeschickt wurde
+if (isset($_POST['name'])) {
+    file_put_contents($db_file, $_POST['name'] . PHP_EOL, FILE_APPEND);
+}
+
+// 2. Auslesen der Namen
+$names = file_exists($db_file) ? file($db_file) : [];
+?>
+
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Demo: Addressbook</title>
+</head>
+<body>
+
+    <h2>Einfaches Adressbuch</h2>
+    
+    <form method="POST">
+        <input type="text" name="name" placeholder="Name eingeben..." required>
+        <button type="submit">Speichern</button>
+    </form>
+
+    <hr>
+
+    <h3>Eintr&auml;ge:</h3>
+    <?php foreach ($names as $name): ?>
+        <div class="entry">
+            Benutzer: <?php echo $name; ?>
+        </div>
+    <?php endforeach; ?>
+
+    <p><small><a href="?clear=1">Liste leeren</a></small></p>
+    <?php if(isset($_GET['clear'])) { file_put_contents($db_file, "" . PHP_EOL); } ?>
+
+</body>
+</html>
+```
+
+create txt file (as database):
+
+```bash
+cd /var/www/*domain-name*
+sudo touch names.txt
+sudo chown www-data:www-data names.txt
+sudo chown www-data:www-data *webapp*
+```
+
+testing the webapp:
+
+```
+http://*domain-name*/*webapp*.php
+```
+
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