KA

Klassenarbeit/db_connect.php

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+<?php
+// DANIEL CWIKLA
+function db_connect() {
+    require_once "db_connection.php";
+
+     $db_server = "$db_engine:dbname=$db_name;host=$db_host";
+
+     try {
+        $dbh = new PDO($db_server, $db_user, $db_password);
+        echo "<p>DB Connected</p>";
+        return $dbh; 
+     }
+     catch(PDOException $e) {
+        die("<p>Error</p>");
+    }
+}
+?>
+
+

Klassenarbeit/db_connection.php

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+<?php
+// DANIEL CWIKLA
+$db_engine = "mysql";
+$db_name = "hardwarefuchs";
+$db_host = "localhost";
+$db_user = "phpmyadmin";
+$db_password = "server";
+?>
+
+

Klassenarbeit/funktionen.php

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+<?php
+// DANIEL CWIKLA
+function kundeEinfuegen($dbh, $kdnr, $nachname, $email){
+
+    if($kdnr != 0 AND $nachname != '' AND $email != "") {
+        // JAHRESUMSATZ und RABATSTUFFE sind auf default 0.00 bzw. 0 
+        // deswegen werden die hier nicht nochmal auf 0.00 bzw. 0 gesetzt
+        $query = "INSERT INTO kunde VALUES (:kdnr, :nachname, :email, 0.00, 0)";
+        $stmt = $dbh->prepare($query);
+
+        $stmt->bindParam(':kdnr', $kdnr);
+        $stmt->bindParam(':nachname', $nachname);
+        $stmt->bindParam(':email', $email);
+        
+        try {			
+            $stmt->execute();
+            return "Kunde (Herr/Frau $nachname) wurde erstellt!";		
+        }
+        catch(PDOException $e) {
+            $errMsg = $e->getMessage();
+            $errCode = $e->getCode(); 
+                        
+            switch($errCode) {
+                case "23000": $custErrMsg = "<p>Email-Adress already exists!</p>"; break;
+                default: $custErrMsg = "<p>Oooops, something went wrong!</p>";
+            }
+            echo $$errMsg;
+            echo $custErrMsg;
+        }
+
+    } else {
+        return "ERROR: missing data";
+    }
+}
+
+function setJahresUmsatz($dbh, $kdnr, $umsatz){
+    if($kdnr != 0 AND $umsatz != 0) {
+        $query = "UPDATE kunde
+            SET jahresumsatz = $umsatz
+            WHERE :kdnr = kd_nummer";
+
+        $stmt = $dbh->prepare($query);
+
+        $stmt->bindParam(':kdnr', $kdnr);
+        //$stmt->bindParam(':umsatz', $umsatz);
+
+        try {
+        $stmt->execute();
+            return "Der JAhresumsatz von Kunde ($kdnr) wurde geupdated!";
+        }
+        catch(PDOException $e) {
+            $errMsg = $e->getMessage();
+            $errCode = $e->getCode(); 
+                        
+            switch($errCode) {
+                case "23000": $custErrMsg = "<p>Email-Adress already exists!</p>"; break;
+                default: $custErrMsg = "<p>Oooops, something went wrong!</p>";
+            }
+            echo $$errMsg;
+            echo $custErrMsg;
+        }
+    }else {
+        return "ERROR: missing data";
+    }
+}
+
+function getJahresUmsatz($dbh, $kdnr){
+    if($kdnr != 0){
+
+        $query = "SELECT jahresumsatz FROM kunde WHERE kd_nummer = $kdnr;";
+        
+        $jahresUmsatzArray = $dbh->query($query)->fetch();
+
+        return $jahresUmsatzArray[0];
+    } else {
+        return "ERROR: missing data";
+    }
+}
+
+function setAllRabattStufen($dbh){
+    $getAllKunden = "SELECT * FROM kunde;";
+
+    $allKunden = $dbh->query($getAllKunden)->fetchAll();
+
+    foreach($allKunden as $kunde) {
+        $rabatt = 0;
+        $umsatz = $kunde[3];
+        $kdnr = $kunde[0];
+
+        echo "umsatz, kdnr";
+        echo $umsatz;
+        echo "---";
+        echo $kdnr;
+        echo "-----";
+        if($umsatz > 250000.0){
+            $rabatt = 25;
+        } else if ($umsatz > 100000.0) {
+            $rabatt = 15;
+        }
+        else if ($umsatz > 50000.0) {
+            $rabatt = 10;
+        }
+        else if ($umsatz > 10000.0) {
+            $rabatt = 5;
+        }
+
+        $updateRabattStufeQuery = "UPDATE kunde
+            SET rabattstufe = :rabatt
+            WHERE :kdnr = kd_nummer";
+
+        $stmt = $dbh->prepare($updateRabattStufeQuery);
+
+        $stmt->bindParam(':kdnr', $kdnr);
+        $stmt->bindParam(':rabatt', $rabatt);
+
+        echo $rabatt;
+
+        try {
+            $stmt->execute();
+                echo "Die Rabattstufe von Kunde ($kdnr) wurde geupdated!";
+        }
+        catch(PDOException $e) {
+            $errMsg = $e->getMessage();
+            $errCode = $e->getCode(); 
+                        
+            switch($errCode) {
+                case "23000": $custErrMsg = "<p>Email-Adress already exists!</p>"; break;
+                default: $custErrMsg = "<p>Oooops, something went wrong!</p>";
+            }
+            echo $$errMsg;
+            echo $custErrMsg;
+        }
+    }
+}
+
+

Klassenarbeit/hardwarefuchs.sql

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+-- phpMyAdmin SQL Dump
+-- version 5.1.1deb5ubuntu1
+-- https://www.phpmyadmin.net/
+--
+-- Host: localhost:3306
+-- Generation Time: May 19, 2026 at 02:41 PM
+-- Server version: 10.6.21-MariaDB-0ubuntu0.22.04.2
+-- PHP Version: 8.1.2-1ubuntu2.21
+
+SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
+START TRANSACTION;
+SET time_zone = "+00:00";
+
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8mb4 */;
+
+--
+-- Database: `hardwarefuchs`
+--
+CREATE DATABASE IF NOT EXISTS `hardwarefuchs` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
+USE `hardwarefuchs`;
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table `kunde`
+--
+
+CREATE TABLE `kunde` (
+  `kd_nummer` int(11) NOT NULL,
+  `nachname` varchar(50) NOT NULL,
+  `email` varchar(100) NOT NULL,
+  `jahresumsatz` float NOT NULL DEFAULT 0,
+  `rabattstufe` int(11) NOT NULL DEFAULT 0
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+--
+-- Dumping data for table `kunde`
+--
+
+INSERT INTO `kunde` (`kd_nummer`, `nachname`, `email`, `jahresumsatz`, `rabattstufe`) VALUES
+(1, 'daniel', 'daniel@daniel.com', 50000.7, 10),
+(2, 'daniel2', 'daniel2@danielvici.com', 0, 0);
+COMMIT;
+
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

Klassenarbeit/kunde_neu.php

@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Neuer Kunde</title>
+</head>
+<body>
+    <h1>DANIEL CWIKLA</h1>
+    <form>
+        <label>Kundennummer: <input name="kdnr" type="number"></label><br>
+        <label>Nachname: <input name="nachname" type="text"></label><br>
+        <label>E-Mail: <input name="email" type="email"></label><br>
+        <button type="submit">Anlegen</button>
+    </form>
+</body>
+</html>
+
+<?php
+// DANIEL CWIKLA
+require_once 'funktionen.php';
+require_once 'db_connect.php';
+
+if(!empty($_REQUEST)){
+    $dbh = db_connect();
+    echo kundeEinfuegen($dbh, $_REQUEST['kdnr'], $_REQUEST['nachname'], $_REQUEST['email']);
+}
+?>

Klassenarbeit/test.php

@@ -0,0 +1,26 @@
+<?php
+// DANIEL CWIKLA
+require_once 'funktionen.php';
+require_once 'db_connect.php';
+
+$dbh = db_connect();
+
+$kdnr = 1;
+$umsatz = 50000.676;
+
+echo "<h2>setJahresUmsatz</h2>";
+echo "<p>Kundennummer: $kdnr</p>";
+echo "<p>Neuer Umsatz: $umsatz</p>";
+
+echo setJahresUmsatz($dbh, $kdnr, $umsatz);
+
+echo "<h2>getJahresUmsatz</h2>";
+
+echo "<p>Jahresumsaz: ";
+// php rundet automatisch: "... num is rounded to decimals significant digits before the decimal point."
+// https://www.php.net/manual/en/function.number-format.php
+echo number_format(getJahresUmsatz($dbh, $kdnr),2);
+echo "€ </p>";
+
+echo "<p>setAllRabattStufen: ";
+echo setAllRabattStufen($dbh);