File handling is an important part of any web application. You often need to open and process a file for different tasks.
PHP Manipulating Files
PHP has several functions for creating, reading, uploading, and editing files.
Be careful when manipulating files!
When you are manipulating files you must be very careful.You can do a lot of damage if you do something wrong. Common errors are: editing the wrong file, filling a hard-drive with garbage data, and deleting the content of a file by accident.