$file = fopen("data.txt", "w");
$file = fopen("data.txt", "r"); $data = fread($file, filesize("data.txt")); fclose($file);This code opens the file "data.txt" for reading, reads all the file's contents using the fread function, and then closes the file using fclose. The PHP fd config package library is part of the PHP standard library, which means that it is always bundled with the PHP runtime and does not need to be manually installed.