Generate a random string

getRandomString.php

<?php

$list = array_merge(range('a', 'z'), range('A', 'Z'), range(0, 9));

function getRandomString($length, $list) {
    $str = array_fill(0, $length, null);
    $str = array_map(function($item) use ($list) { return $list[array_rand($list)]; }, $str);

    return join($str, '');
}

echo getRandomString(15, $list).PHP_EOL;