While prepared statements are the primary defense, defense-in-depth suggests adding layers of security. If the id parameter is expected to be a number, the code should enforce that.
Patching via Type Casting:
$id = (int) $_GET['id']; // Forces the input to be an integer
If an attacker inputs a string of SQL commands, PHP converts it to 0 or an integer, neutralizing the attack immediately. inurl indexphpid patched
Many open-source CMS platforms have changelog files (CHANGELOG.txt, README.md) containing lines like: "Patched SQL injection vulnerability in index.php?id= parameter." Search engines index these files. If an attacker inputs a string of SQL
To understand the whole, we must first break down the parts. inurl indexphpid patched