getPost.php

<?php
include "./lib/config.php";
include "./lib/mysql.php";

$id = $conn->real_escape_string($_GET["id"]);
$result = $conn->query("SELECT * FROM posts WHERE id=$id");
if ($result->num_rows > 0) {
    $row = $result->fetch_assoc();
} else {
    die("Post not found");
}

$title = $row["title"];
$content = $row["content"];
$date = $row["date"];
$id = $row["id"];

header('Content-Type: application/json');
echo json_encode([
    "title" => $title,
    "content" => $content,
    "date" => $date,
    "id" => $id
]);