crud example

index.php

@@ -0,0 +1,55 @@
+<?php
+
+// connect to database sqlite database using PDO
+$pdo = new PDO('sqlite:db.sqlite');
+
+// C = CREATE
+// insert data into table
+$query = $pdo->prepare(
+    'INSERT INTO allergies ("label", "from", "to") VALUES (:label, :from, :to)');
+$query->execute([
+    'label' => 'Peanuts',
+    'from' => strtotime('2025-01-01'),
+    'to' => strtotime('2025-12-31'),
+]);
+
+// last inserted id
+$lastId = $pdo->lastInsertId();
+echo 'Last inserted id: ' . $lastId;
+
+// R = READ
+// select data from table
+$query = $pdo->prepare('SELECT * FROM allergies');
+$query->execute();
+$allergies = $query->fetchAll(PDO::FETCH_ASSOC);
+
+echo "<table border='1'>";
+foreach ($allergies as $allergy) {
+    // echo '<pre>';
+    // print_r($allergy);
+    // echo '</pre>';
+    echo "<tr>";
+    echo "<td>" . $allergy['id'] . "</td>";
+    echo "<td>" . $allergy['label'] . "</td>";
+    echo "<td>" . date('d.m. Y', $allergy['from']) . "</td>";
+    echo "<td>" . date('d.m. Y', $allergy['to']) . "</td>";
+    echo "</tr>";
+}
+echo "</table>";
+
+
+// U = UPDATE
+// update data in table
+$query = $pdo->prepare('UPDATE allergies SET "label" = :label WHERE "id" = :id');
+$query->execute([
+    'label' => 'Peanuts (updated)',
+    'id' => $lastId,
+]);
+
+
+// D = DELETE
+// delete data from table
+$query = $pdo->prepare('DELETE FROM allergies WHERE "id" = :id');
+$query->execute([
+    'id' => $lastId,
+]);