mirror of
https://github.com/janunger/rheinwerk-video-training.git
synced 2026-02-06 07:05:14 +01:00
Initiale Version
This commit is contained in:
Jan Unger
14
Kapitel_10/Lektion_4/konventionell/_application.php
Executable file
14
Kapitel_10/Lektion_4/konventionell/_application.php
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<?php
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/**
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* @return PDO
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*/
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function holeDatenbankVerbindung()
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{
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return new PDO(
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'mysql:dbname=mediathek;host=localhost',
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'root',
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'root',
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[PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"]
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);
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}
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77
Kapitel_10/Lektion_4/konventionell/cd.php
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77
Kapitel_10/Lektion_4/konventionell/cd.php
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<?php
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require __DIR__ . '/_application.php';
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if (count($_POST) > 0) {
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$insertStatement = $db->prepare("
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INSERT INTO lieder (cd_id, track, titel) VALUES (:cd_id, :track, :titel)
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");
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$insertStatement->execute([
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'cd_id' => $_GET['id'],
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'track' => $_POST['track'],
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'titel' => $_POST['titel'],
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]);
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header('Location: cd.php?id=' . htmlspecialchars($_GET['id']));
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exit;
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}
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$db = holeDatenbankVerbindung();
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$cdStatement = $db->prepare("
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SELECT
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c.id,
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c.name AS cdname,
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c.erscheinungsjahr,
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k.name AS kuenstlername
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FROM cds AS c
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LEFT JOIN kuenstler AS k ON c.kuenstler_id = k.id
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WHERE c.id = :cd_id
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");
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$cdStatement->execute(['cd_id' => $_GET['id']]);
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$cd = $cdStatement->fetch(PDO::FETCH_ASSOC);
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$liederStatement = $db->prepare("SELECT * FROM lieder WHERE cd_id = :cd_id ORDER BY track ASC");
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$liederStatement->execute(['cd_id' => $_GET['id']]);
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$lieder = $liederStatement->fetchAll(PDO::FETCH_ASSOC);
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Mediathek</title>
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</head>
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<body>
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<h1>
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<?= htmlspecialchars($cd['cdname']) ?>
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(<?= htmlspecialchars($cd['kuenstlername']) ?>, <?= htmlspecialchars($cd['erscheinungsjahr']) ?>)
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</h1>
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<form action="cd.php?id=<?= htmlspecialchars($_GET['id']) ?>" method="post">
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<table>
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<tr>
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<th>Track</th>
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<th>Titel</th>
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<th></th>
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<th></th>
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</tr>
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<?php foreach ($lieder as $lied): ?>
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<tr>
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<td><?= htmlspecialchars($lied['track']) ?></td>
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<td><?= htmlspecialchars($lied['titel']) ?></td>
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<td><a href="lied_bearbeiten.php?id=<?= htmlspecialchars($lied['id']) ?>">Bearbeiten ...</a></td>
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<td><a href="lied_loeschen.php?id=<?= htmlspecialchars($lied['id']) ?>">Löschen ...</a></td>
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</tr>
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<?php endforeach; ?>
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<tr>
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<td><input type="text" name="track" placeholder="Track"/></td>
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<td><input type="text" name="titel" placeholder="Titel"/></td>
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</tr>
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</table>
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<input type="submit" value="Hinzufügen"/>
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</form>
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<p><a href="index.php">zur Übersicht</a></p>
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</body>
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</html>
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46
Kapitel_10/Lektion_4/konventionell/index.php
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46
Kapitel_10/Lektion_4/konventionell/index.php
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<?php
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require __DIR__ . '/_application.php';
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$db = holeDatenbankVerbindung();
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$statement = $db->query("
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SELECT
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c.id,
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c.name AS cdname,
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c.erscheinungsjahr,
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k.name AS kuenstlername
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FROM cds AS c
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LEFT JOIN kuenstler AS k ON c.kuenstler_id = k.id
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");
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$cds = $statement->fetchAll(PDO::FETCH_ASSOC);
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Mediathek</title>
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</head>
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<body>
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<table>
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<tr>
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<th>Künstler</th>
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<th>Album</th>
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<th>Erscheinungsjahr</th>
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</tr>
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<?php foreach ($cds as $cd): ?>
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<tr>
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<td><?= htmlspecialchars($cd['kuenstlername']) ?></td>
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<td>
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<a href="cd.php?id=<?= $cd['id'] ?>">
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<?= htmlspecialchars($cd['cdname']) ?>
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</a>
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</td>
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<td><?= htmlspecialchars($cd['erscheinungsjahr']) ?></td>
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</tr>
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<?php endforeach; ?>
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</table>
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</body>
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</html>
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77
Kapitel_10/Lektion_4/konventionell/lied_bearbeiten.php
Executable file
77
Kapitel_10/Lektion_4/konventionell/lied_bearbeiten.php
Executable file
@@ -0,0 +1,77 @@
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<?php
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require __DIR__ . '/_application.php';
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$meldungen = [];
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if (!isset($_GET['id'])) {
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$meldungen[] = 'Bitte geben Sie die ID des Liedes an, das Sie bearbeiten möchten.';
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}
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$db = holeDatenbankVerbindung();
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$liedStatement = $db
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->prepare("
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SELECT
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l.track,
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l.titel,
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c.id cd_id,
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c.name cdname,
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k.name kuenstlername
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FROM lieder l
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LEFT JOIN cds c ON l.cd_id = c.id
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LEFT JOIN kuenstler k ON c.kuenstler_id = k.id
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WHERE l.id = :lied_id
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");
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$liedStatement->execute(['lied_id' => $_GET['id']]);
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$lied = $liedStatement->fetch(PDO::FETCH_ASSOC);
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if (!$lied) {
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$meldungen[] = 'Es konnte kein Lied mit der ID ' . htmlspecialchars($_GET['id']) . ' gefunden werden.';
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}
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if (isset($_POST['aktion'])) {
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if ('speichern' === $_POST['aktion']) {
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$db
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->prepare("UPDATE lieder SET track = :track, titel = :titel WHERE id = :lied_id")
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->execute([
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'track' => $_POST['track'],
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'titel' => $_POST['titel'],
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'lied_id' => $_GET['id']
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]);
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}
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header('Location: cd.php?id=' . htmlspecialchars($lied['cd_id']));
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exit;
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}
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Mediathek</title>
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</head>
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<body>
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<?php if (count($meldungen) > 0): ?>
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<p>Fehler:</p>
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<ul>
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<?php foreach ($meldungen as $meldung): ?>
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<li><?= htmlspecialchars($meldung) ?></li>
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<?php endforeach; ?>
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</ul>
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<?php endif; ?>
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<form action="lied_bearbeiten.php?id=<?= htmlspecialchars($_GET['id']) ?>" method="post">
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<h1>Lied bearbeiten</h1>
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<h2>'<?= htmlspecialchars($lied['cdname']) ?>' (<?= htmlspecialchars($lied['kuenstlername']) ?>)</h2>
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<label>Track
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<input type="text" name="track" value="<?= htmlspecialchars($lied['track']) ?>"/>
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</label>
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<label>Titel
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<input type="text" name="titel" value="<?= htmlspecialchars($lied['titel']) ?>"/>
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</label>
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<button type="submit" name="aktion" value="speichern">Speichern</button>
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<button type="submit" name="aktion" value="abbrechen">Abbrechen</button>
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</form>
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</body>
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</html>
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70
Kapitel_10/Lektion_4/konventionell/lied_loeschen.php
Executable file
70
Kapitel_10/Lektion_4/konventionell/lied_loeschen.php
Executable file
@@ -0,0 +1,70 @@
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<?php
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require __DIR__ . '/_application.php';
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$meldungen = [];
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if (!isset($_GET['id'])) {
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$meldungen[] = 'Bitte geben Sie die ID des Liedes an, das Sie löschen möchten.';
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}
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$db = holeDatenbankVerbindung();
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$liedStatement = $db
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->prepare("
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SELECT
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l.track,
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l.titel,
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c.id cd_id,
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c.name cdname,
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k.name kuenstlername
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FROM lieder l
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LEFT JOIN cds c ON l.cd_id = c.id
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LEFT JOIN kuenstler k ON c.kuenstler_id = k.id
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WHERE l.id = :lied_id
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");
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$liedStatement->execute(['lied_id' => $_GET['id']]);
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$lied = $liedStatement->fetch(PDO::FETCH_ASSOC);
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if (!$lied) {
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$meldungen[] = 'Es konnte kein Lied mit der ID ' . htmlspecialchars($_GET['id']) . ' gefunden werden.';
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}
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if (isset($_POST['aktion'])) {
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if ('loeschen' === $_POST['aktion']) {
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$db->prepare("DELETE FROM lieder WHERE id = :lied_id")->execute(['lied_id' => $_GET['id']]);
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}
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header('Location: cd.php?id=' . htmlspecialchars($lied['cd_id']));
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exit;
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}
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Mediathek</title>
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</head>
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<body>
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<?php if (count($meldungen) > 0): ?>
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<p>Fehler:</p>
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<ul>
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<?php foreach ($meldungen as $meldung): ?>
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<li><?= htmlspecialchars($meldung) ?></li>
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<?php endforeach; ?>
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</ul>
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<?php else: ?>
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<form action="lied_loeschen.php?id=<?= htmlspecialchars($_GET['id']) ?>" method="post">
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<h1>Lied löschen</h1>
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<h2>'<?= htmlspecialchars($lied['cdname']) ?>' (<?= htmlspecialchars($lied['kuenstlername']) ?>)</h2>
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<p>
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Möchten Sie Track <?= $lied['track'] ?> '<?= htmlspecialchars($lied['titel']) ?>' löschen?<br>
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Diese Aktion kann nicht rückgängig gemacht werden.
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</p>
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<button type="submit" name="aktion" value="loeschen">Löschen!</button>
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<button type="submit" name="aktion" value="abbrechen">Abbrechen</button>
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</form>
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<?php endif; ?>
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</body>
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</html>
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