: A Google search operator that restricts results to pages where the following text appears in the URL.

: A keyword used to further narrow results to specific pages containing that term. What is a "Deep Feature"?

If your interest in index.php?id= relates to how blogs are built, consider these guides:

: Likely refers to a specific CMS (Content Management System) or directory name.

: Searches for sites that have the directory or path name "commy" in their URL. : Targets websites built using , specifically those that use as their primary entry point or "front controller". : Specifically targets pages passing the variable with the value superglobal array. Google for Developers Common Uses

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