php实现随机生成易于记忆的密码

function random_readable_pwd($length=10){
  // the wordlist from which the password gets generated 
  // (change them as you like)
  $words = dog,cat,sheep,sun,sky,red,ball,happy,ice,;
  $words .= green,blue,music,movies,radio,green,turbo,;
  $words .= mouse,computer,paper,water,fire,storm,chicken,;
  $words .= boot,freedom,white,nice,player,small,eyes,;
  $words .= path,kid,box,black,flower,ping,pong,smile,;
  $words .= coffee,colors,rainbow,plus,king,tv,ring;
  // Split by ",":
  $words = explode(,, $words);
  if (count($words) == 0){ die(Wordlist is empty!); }
  // Add words while password is smaller than the given length
  $pwd = ;
  while (strlen($pwd) < $length){
    $r = mt_rand(0, count($words)-1);
    $pwd .= $words[$r];
  }
  // append a number at the end if length > 2 and
  // reduce the password size to $length
  $num = mt_rand(1, 99);
  if ($length > 2){
    $pwd = substr($pwd,0,$length-strlen($num)).$num;
  } else { 
    $pwd = substr($pwd, 0, $length);
  }
  return $pwd;
}
//使用范例：
random_readable_pwd(10) => returns something like: pingwater6, radiohap28, sunwhite84, happykid44, etc...