What are the commonly used php file functions?

Briefly organize some common functions for operating files in PHP:

• filetype() Get the file type function

• is_dir() Judge the given Whether the file name is a directory

• is_executable() Determine whether the given file is executable

• is_file() Determine whether the given file is executable Exists

• is_link() Determines whether the given file is a symbolic link (soft link)

• is_readable() Determines whether the given file is readable

• is_writeable() Determine whether the given file is writable

• file_exists() Determine whether the file or directory exists

• filesize() Get the file size (cannot get the directory size)

• filectime() File creation time

• filemtime() File modification time

• fileatime() File access time

• ##stat() Get most of the file parameters

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