Problems with mkdir creating multi-level directories

mkdir(path,mode,recursive,context)

rrree

parameter	description
path	required. Specifies the name of the directory to be created.
mode	required. Specify permissions. The default is 0777.
recursive	Required. Specifies whether to set recursive mode.
context	Required. Specifies the environment for a file handle. Context is a set of options that modify the behavior of the stream.

Multi-level directories will be automatically created only when the third parameter is set to true

The above has introduced the problem of creating multi-level directories with mkdir, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.