Question

我有这个函数用于生成随机字符串。这工作但我需要生成一个数字和一个字母总是随机字符串。

function random() {
    $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789!@#$%^&*()_+=-";
    $pass = array(); //remember to declare $pass as an array
    $alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
    for ($i = 0; $i < 8; $i++) {
        $n = rand(0, $alphaLength);
        $pass[] = $alphabet[$n];
    }
    return implode($pass); //turn the array into a string
}

如何编辑我的代码并在随机字符串中生成一个数字和字母。

Answer 1

这样可行，但请记住，这是一种制作密码的可靠方法。

function random() {
  $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789!@#$%^&*()_+=-";
  $pass = array(); //remember to declare $pass as an array
  $alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
  $pass[] = $alphabet[rand(0, 49)]; // Grab a random letter.
  $pass[] = $alphabet[rand(50, 59)]; // Grab a random number.
  for ($i = 0; $i < 6; $i++) {
      $n = rand(0, $alphaLength);
      $pass[] = $alphabet[$n];
  }
  shuffle($pass);
  return implode($pass); //turn the array into a string
}

这是一个稍微好一点的版本，它使用了一些真正的伪熵。

function random() {
  srand(time());
  mt_srand(rand());
  srand(mt_rand());
  // You might also want to use openssl_random_pseudo_bytes() if available and
  // not on a Windows w/PHP < 5.3 host.
  // On Linux, think about including from /dev/urandom.
  $entropy = str_split(hash('sha256', uniqid('awesomesalt', TRUE) . mcrypt_create_iv(64) . microtime() . rand() . mt_rand(), TRUE));
  $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789!@#$%^&*()_+=-";
  $pass = array(); //remember to declare $pass as an array
  $alphaLength = strlen($alphabet); //put the length in cache
  $rand = floor(ord(array_pop($entropy)) * 50 / 255.1);
  $pass[] = $alphabet[0 + $rand]; // Grab a random letter.
  $rand = floor(ord(array_pop($entropy)) * 10 / 255.1);
  $pass[] = $alphabet[50 + $rand]; // Grab a random number.
  for ($i = 0; $i < 6; $i++) {
      $rand = floor(ord(array_pop($entropy)) * $alphaLength / 255.1);
      $pass[] = $alphabet[$rand];
  }
  shuffle($pass);
  return implode($pass); //turn the array into a string
}

php随机字符串，带一个数字和一个字母

1 个答案: