New DB based GuestBook

2024-06-14 13:48:24 +02:00
parent 15d3507b04
commit 70da3e66fd
14 changed files with 403 additions and 2 deletions
@@ -0,0 +1,96 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <?php include_once "../../base/meta.php" ?>
+  <title>Functions 2</title>
+</head>
+
+<body>
+  <?php
+  include_once "../../base/settings.php";
+  include_once "../../base/headers.php";
+  Headers::html();
+
+  include_once "../../base/database.php";
+
+  $db = DB::openConnection();
+
+  function getFirmenAnzahl($land, $db)
+  {
+    $query = "SELECT COUNT(*) AS Anzahl FROM Lieferanten WHERE Land = :LAND";
+    $stmt = $db->prepare($query);
+    $stmt->bindValue(":LAND", $land);
+    $stmt->execute();
+    return $stmt->fetch(PDO::FETCH_COLUMN);
+  }
+
+  function getArtikelname($artikelnr, $db)
+  {
+    $query = "SELECT Artikelname FROM Artikel WHERE ArtikelNr = :NR";
+    $stmt = $db->prepare($query);
+    $stmt->bindValue(":NR", $artikelnr);
+    $stmt->execute();
+    return $stmt->fetch(PDO::FETCH_COLUMN);
+  }
+
+  function getArtikelAnzahl($firma, $db)
+  {
+    $query = "SELECT COUNT(*) FROM Artikel AS A, Lieferanten AS L WHERE A.LieferantenNr = L.LieferantenNr AND L.Firma = :FIRMA";
+    $stmt = $db->prepare($query);
+    $stmt->bindValue(":FIRMA", $firma);
+    $stmt->execute();
+    return $stmt->fetch(PDO::FETCH_COLUMN);
+  }
+
+  function updPercArticle($firma, $perc, $db)
+  {
+    $query = "
+      UPDATE
+        Artikel AS A, Lieferanten AS L
+      SET
+        A.Einzelpreis = A.Einzelpreis * :PERC
+      WHERE
+        A.LieferantenNr = L.LieferantenNr AND
+          L.Firma = :FIRMA";
+    $stmt = $db->prepare($query);
+    $stmt->bindValue(":FIRMA", $firma);
+    $stmt->bindValue(":PERC", 1 + $perc / 100);
+    $stmt->execute();
+  }
+
+  $anz_de = getFirmenAnzahl("Deutschland", $db);
+  $anz_fr = getFirmenAnzahl("Frankreich", $db);
+  $name = getArtikelname(1, $db);
+  $anz_exotic = getArtikelAnzahl("Exotic Liquids", $db);
+
+  echo "<p>Es sind $anz_de Firmen in Deutschland ansässig.</p>";
+  echo "<p>Es sind $anz_fr Firmen in Frankreich ansässig.</p>";
+
+  echo "<p>$name hat Art.Nr. 1</p>";
+
+  echo "<p>Exotic Liquids liefert $anz_exotic Artikel</p>";
+
+  echo "<p>Before price hike</p>";
+  $query = "SELECT A.Einzelpreis FROM Artikel AS A, Lieferanten AS L WHERE A.LieferantenNr = L.LieferantenNr AND L.Firma = 'Tokyo Traders'";
+  $stmt = $db->prepare($query);
+  $stmt->execute();
+  echo "<pre>";
+  var_dump($stmt->fetchAll());
+  echo "</pre>";
+
+  updPercArticle("Tokyo Traders", 10, $db);
+
+  echo "<p>After price hike</p>";
+  $query = "SELECT A.Einzelpreis FROM Artikel AS A, Lieferanten AS L WHERE A.LieferantenNr = L.LieferantenNr AND L.Firma = 'Tokyo Traders'";
+  $stmt = $db->prepare($query);
+  $stmt->execute();
+  echo "<pre>";
+  var_dump($stmt->fetchAll());
+  echo "</pre>";
+
+  DB::closeConnection($db);
+  ?>
+</body>
+
+</html>