$file = "lul.txt"; // File 
$fileo = fopen($file , 'r'); // Open $file for reading
/* Will select a random number between the minimal and maximal integer and pass to fgets */
$random = rand(1, 20); // see above.
$randomproxy = fgets($fileo, $random); // Defines $randomproxy as a random line from $file
echo $randomproxy; // Echos it.