php密码生成类(附源码)

<?php 
/** Generate Password class，根据指定规则生成password
*   Date:   2013-12-23
*   Author: fdipzone
*   Ver:    1.0
*   edit：www.jbxue.com
*   Func:
*   public  batchGenerate 批量生成密码
*   private generate      生成单个密码
*   private getLetter     获取字母  
*   private getNumber     获取数字
*   private getSpecial    获取特殊字符
*/ 
 
class GeneratePassword{ // class start 
 
    // 密码的规则 default 
    private $_rule = array( 
     'letter' => 1, 
     'number' => 1, 
     'special' => 1 
 ); 
 
    private $_length = 8;                 // 密码长度 
    private $_num = 1;                    // 密码数量 
    private $_special = '!@#$%^&*()_+=-'; //允许的特殊字符 
 
 
    /** 初始化
    * @param int    $length  密码长度
    * @param int    $num     密码数量
    * @param Array  $rule    密码规则
    * @param String $special 允许的特殊字符
    */ 
    public function __construct($length=8, $num=1, $rule=array(), $special=''){ 
 
        if(isset($length) && is_numeric($length) && $length>=4 && $length<=50){ // 长度 
            $this->_length = $length; 
        } 
 
        if(isset($num) && is_numeric($num) && $num>0 && $num<=100){ // 数量 
            $this->_num = $num; 
        } 
 
        if(isset($special) && is_string($special) && $special!=''){ // 特殊字符 
            $this->_special = $special; 
        } 
 
        if($rule){ // 规则 
 
            $t_rule = array(); 
 
            if(isset($rule['letter']) && in_array($rule['letter'], array(1,2,3,4,5))){ // 1:可选用 2:必须 3:必须小写 4:必须大写 5:大小写都必须 
                $t_rule['letter'] = $rule['letter']; 
            } 
 
            if(isset($rule['number']) && in_array($rule['number'], array(1,2))){ // 1:可选用 2:必须 
                $t_rule['number'] = $rule['number']; 
            } 
 
            if(isset($rule['special']) && in_array($rule['special'], array(1,2))){ // 1:可选用 2:必须 
                $t_rule['special'] = $rule['special']; 
            } 
 
            if($t_rule){ 
                $this->_rule = $t_rule; 
            }
        } 
    } 
  
    /** 批量生成密码
    * @return Array
    */ 
    public function batchGenerate(){ 
        $passwords = array(); 
        for($i=0; $i<$this->_num; $i++){ 
            array_push($passwords, $this->generate()); 
        } 
 
        return $passwords; 
    } 
   
    /** 生成单个密码
    * @return String
    */ 
    private function generate(){ 
 
        $password = ''; 
        $pool = ''; 
        $force_pool = ''; 
 
        if(isset($this->_rule['letter'])){ 
 
            $letter = $this->getLetter(); 
 
            switch($this->_rule['letter']){ 
                case 2: 
                    $force_pool .= substr($letter, mt_rand(0,strlen($letter)-1), 1); 
                    break; 
 
                case 3: 
                    $force_pool .= strtolower(substr($letter, mt_rand(0,strlen($letter)-1), 1)); 
                    $letter = strtolower($letter); 
                    break; 
 
                case 4: 
                    $force_pool .= strtoupper(substr($letter, mt_rand(0,strlen($letter)-1), 1)); 
                    $letter = strtoupper($letter); 
                    break; 
 
                case 5: 
                    $force_pool .= strtolower(substr($letter, mt_rand(0,strlen($letter)-1), 1)); 
                    $force_pool .= strtoupper(substr($letter, mt_rand(0,strlen($letter)-1), 1)); 
                    break; 
            } 
            $pool .= $letter; 
        } 
 
        if(isset($this->_rule['number'])){ 
 
            $number = $this->getNumber(); 
 
            switch($this->_rule['number']){ 
                case 2: 
                    $force_pool .= substr($number, mt_rand(0,strlen($number)-1), 1); 
                    break; 
            } 
            $pool .= $number; 
        } 
 
        if(isset($this->_rule['special'])){ 
 
            $special = $this->getSpecial(); 
 
            switch($this->_rule['special']){ 
                case 2: 
                    $force_pool .= substr($special, mt_rand(0,strlen($special)-1), 1); 
                    break; 
            } 
            $pool .= $special; 
        } 
 
        $pool = str_shuffle($pool); // 随机打乱 
        $password = str_shuffle($force_pool. substr($pool, 0, $this->_length-strlen($force_pool))); // 再次随机打乱 
        return $password;
    } 
 
    /** 字母 */ 
    private function getLetter(){ 
        $letter = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz'; 
        return $letter; 
    }
   
    /** 数字 */ 
    private function getNumber(){ 
        $number = '1234567890'; 
        return $number; 
    }
 
    /** 特殊字符 */ 
    private function getSpecial(){ 
        $special = $this->_special; 
        return $special; 
    } 
 
} // class end 
 
?>

<?php 
require 'GeneratePassword.class.php'; 
 
$rule = array( 
    'letter' => 5, // 必须含有大小写字母 
    'number' => 2, // 必须含有数字 
    'special' => 2 // 必须含有特殊字符 
); 
 
$special = '!@#$%_-'; 
 
$obj = new GeneratePassword(8, 10, $rule, $special); 
$passwords = $obj->batchGenerate(); 
 
echo implode('<br>', $passwords); 
?>