inurl:index.php%3Fid= is a URL query pattern where "index.php?id=" is URL-encoded as "index.php%3Fid=". It commonly appears in search-engine query filters to locate pages with a numeric or string id parameter (often used by CMSs, legacy PHP apps, or dynamic pages). It is frequently used in security research, site mapping, and content discovery.
In the world of web development, we often strive for simplicity. However, sometimes the simplest ways to fetch data—like using a visible ID in a URL—can leave the door wide open for cyberattacks. If you’ve ever seen a URL ending in index.php?id=123 inurl index.php%3Fid=
Websites that have URLs containing index.php?id= and similar patterns can be vulnerable to: Systematic treatment of "inurl:index
Fast: Simple for the server to look up a number in a database. ) to find the corresponding content in a database like MySQL
—a specific search string used by hackers and cybersecurity researchers to find websites that might be vulnerable to SQL Injection (SQLi) The Art of Service Academy
Indexing and SEO: Webmasters use this to ensure that dynamic content is being properly crawled by Google Search Console.
<?php
$id = $_GET['id'];
$query = "SELECT * FROM articles WHERE id = " . $id;
$result = mysqli_query($conn, $query);
// ... render page based on $result
?>
) to find the corresponding content in a database like MySQL.