Int Random

intRandom.php

/**
 * @param int $size
 * @return interger
 */
public function intRandom($size) {
    $validCharacters = utf8_decode("0123456789");
    $validCharNumber = strlen($validCharacters);
    $int = '';
    while (strlen($int) < $size) {
        $index = mt_rand(0, $validCharNumber - 1);
        $int .= $validCharacters[$index];
    }
    return $int;
}