Inurl | Index.php%3fid=

$id = $_GET['id']; $result = mysqli_query($conn, "SELECT * FROM users WHERE id = $id");

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Here is the historical context: In the early 2000s, when PHP and MySQL became the dominant force for web development (think WordPress, Joomla, osCommerce), many novice developers built dynamic sites like this: $id = $_GET['id']; $result = mysqli_query($conn, "SELECT *