This specific Google search term is a Google Dork used by security researchers and hackers to find websites vulnerable to SQL Injection (SQLi) attacks.
Assume you have permission (e.g., bug bounty, internal pen test). inurl index.php%3Fid=
: This represents the default execution file for many PHP-based web applications. PHP is one of the most widely used server-side scripting languages on the internet. This specific Google search term is a Google
: They add a single quote ( ' ) to the end of the URL (e.g., ?id=10' ). If the page returns a database error, the site is likely vulnerable. the site is likely vulnerable.