Working with files

There are a number of functions in PHP for working with files.

• fopen(), low-level access to files on disk
• file_get_contents(), retrieve the contents of a file or URL
• file_put_contents(), saving a string to a local file.

Disk functions

• unlink($path), delete file
• copy($from, $to), copy a file from one location to another (can be from a URL to the local disk)
• rename(), rename or move a file on disk
• chmod(), change permissions to read, write or execute a file