Glob function implementation principle

Glob function implementation principle ???

Reply to discussion (solution)

How does this work? It is to call the OS api interface to parse the path, locate the path, traverse and find all files and directories in the directory, and return results.

If you really want to investigate the implementation principles, you can look at the php source code implementation, baidu searched a bunch.

It encapsulates a method to retrieve files under the traversal directory, and then saves the files that meet the criteria to the array and returns the results through regular expression filtering.