Skip Navigation

If you are writing custom PHP, never put $GET['id'] directly into a SQL query.

Ensuring that the id parameter only accepts integers.

Here is an in-depth look at what this query means, why it’s significant, and how high-quality security practices can protect against the risks it highlights. What Does "inurl:php?id=1" Actually Mean?

Historically, many sites using php?id= were poorly coded. If a developer didn't "sanitize" the input—meaning they didn't check if the "1" was actually a number or a piece of malicious code—the site became vulnerable to .