To understand this string, we have to break it down into its core components:
| Operator | Description | Real-World Example | | :--- | :--- | :--- | | | Restricts results to a specific domain or subdomain. | site:example.com | | inurl: | Searches for a specific string within the URL of a page. | inurl:admin | | intitle: | Searches for a specific string within the page's title. | intitle:"index of" | | filetype: | Filters results to a specific file extension (e.g., pdf , sql , env ). | filetype:sql | | cache: | Shows the cached (stored) version of a page as it appeared when Google last indexed it. | cache:example.com |
The attacker enters inurl:index.php?id= into Google. The results page populates with thousands—sometimes millions—of URLs that follow this exact pattern: https://example.com/index.php?id=123 inurl index.php%3Fid=
// Local File Inclusion (LFI) include($_GET['id'] . ".php");
The act of simply searching using Google Dorks is generally legal. You are looking at information that Google has voluntarily indexed from public websites. To understand this string, we have to break
Not everyone using these dorks is a "bad actor." Security professionals and "Bug Bounty" hunters use these queries to find and help fix vulnerabilities before they can be exploited. Lists of these dorks are often maintained in places like the Exploit Database (Exploit-DB) , which serves as a library for known vulnerable patterns. How to Protect Your Website
inurl:index.php?id= is a common Google dork used by security researchers and web administrators to find pages that use dynamic parameters, often for testing vulnerabilities like SQL injection or identifying specific types of CMS structures. | intitle:"index of" | | filetype: | Filters
http://target.com/page.php?id=1' AND 1=1-- - http://target.com/page.php?id=1' AND 1=2-- -
If an attacker modifies the URL parameter to index.php?id=5 OR 1=1 , the database executes: SELECT * FROM articles WHERE id = 5 OR 1=1; Use code with caution.