Add a random number of tabs to random lines in a string

fitzify.php

<?php

function fitzify ($input) {
    return implode(\PHP_EOL, array_map(function($line) {
        return $line . (rand(1, 4) == 1 ? str_repeat("\t", rand(1, 4)) : '');
    }, explode(\PHP_EOL, $input)));
}

$a = file_get_contents(__FILE__);
echo fitzify($a);