Reading/Writing files

• file_get_contents : read content of a file
• file_put_contents : write content to a file

• Rem. Accessing files (on the client machine) in JavaScript is tricky (sandbox limitation for security issues).
• Accessing files (on the server) in PHP is easy.
• • No security issue: only the server can access to its files
• \(\Rightarrow\) You can store/share any information in a permanent way through different users

• Examples: Reading and drawing all images within directory, counting and storing the number of times a page has been viewed.