Gets details for files in a directory or a specific file.
Checks if resource is a file.
Checks if resource is a directory.
Checks if a file is readable.
Reads entire file into a string.
Checks if a file or directory is writable.
Reads entire file into an array.
Gets the file’s last access time.
Writes a string to a file.
Gets the file modification time.
Gets the current working directory.
Gets the file size (in bytes).