class Password
{

/**

• 大写字母 A-Z
• @var array
  */
  protected $uppercase_chars;

/**

• 小写字母 a-z
• @var array
  */
  protected $lowercase_chars;

/**

• 阿拉伯数字 0-9
• @var array
  */
  protected $number_chars;

/**

• 特殊字符
• @var array
  */
  protected $special_chars;

/**

• 其他特殊字符
• @var array
  */
  protected $extra_chars;

/**

• 最终用来生成密码的所有字符
• @var array
  */
  protected $chars = array();

/**

• 密码长度
• @var array
  */
  public $length;

/**

• 是否使用大写字母
• @var boolean
  */
  public $uppercase;

/**

• 是否使用小写字母
• @var boolean
  */
  public $lowercase;

/**

• 是否使用阿拉伯数字
• @var boolean
  */
  public $number;

/**

• 是否使用特殊字符
• @var boolean
  */
  public $special;

/**

• 是否使用额外的特殊字符
• @var boolean
  */
  public $extra;

/**

• 初始化密码设置
• @param int $length
  */
  function Password($length = 12)
  {
  $this->length = $length;

$this->configure(true,true,false,false);

}

/**

• 配置
  */
  function configure($uppercase = false,$lowercase = false,$number = false,$special = false,$extra = false
  ) {
  $this->chars = array();

$this->upper_chars  = array(
             "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"
            );
$this->lower_chars  = array(
             "a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"
            );
$this->number_chars = array(
             "1","2","3","4","5","6","7","8","9","0"
            );
$this->special_chars = array(
             "!","@","#","$","%","^","&","*","(",")"
            );
$this->extra_chars  = array(
             "[","]","{","}","-","_","+","=","<","&gt;","?","/","`","~","|",",".",";",":"
            );

if (($this->uppercase = $uppercase) === true) {
  $this->chars = array_merge($this->chars,$this->upper_chars);
}
if (($this->lowercase = $lowercase) === true) {
  $this->chars = array_merge($this->chars,$this->lower_chars);
}
if (($this->number = $number) === true) {
  $this->chars = array_merge($this->chars,$this->number_chars);
}
if (($this->special = $special) === true) {
  $this->chars = array_merge($this->chars,$this->special_chars);
}
if (($this->extra = $extra) === true) {
  $this->chars = array_merge($this->chars,$this->extra_chars);
}

$this->chars = array_unique($this->chars);

}

/**

• 从字符列中生成随机密码
• @return string
  **/
  function generate()
  {
  if (empty($this->chars)) {
  return false;
  }

$hash    = '';
$totalChars = count($this->chars) - 1;

for ($i = 0; $i < $this->length; $i++) {
  $hash .= $this->chars[$this->random(0,$totalChars)];
}

return $hash;

}

/**

• 生成随机数字
• @return int
  */
  function random($min = 0,$max = 0)
  {
  $max_random = 4294967295;

$random = uniqid(microtime() . mt_rand(),true);
$random = sha1(md5($random));

$value = substr($random,8);
$value = abs(hexdec($value));

if ($max != 0) {
  $value = $min + ($max - $min + 1) * $value / ($max_random + 1);
}

return abs(intval($value));

}
}

echo $passGen->generate();

//FS4yq74e2LeE