This is an advanced search operator used by Google. It tells the search engine to only return results where the specified text appears inside the website's URL.
This indicates a website using the PHP programming language that is fetching data from a database. php is the file extension. ?id= is a query parameter. inurl php id 1 link
Here is a deep dive into what this link pattern means, why it became famous, and why it still matters today. What is "inurl:php?id=1"? This is an advanced search operator used by Google
The legacy of inurl:php?id=1 is a testament to the importance of input validation. It serves as a reminder that the simplest part of a website—the URL—can often be the front door for an intruder if the locks aren't properly installed. why it became famous