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php生成一个安全随机的密码程序

Jun 13, 2016 am 09:50 AM
php Can Can Safety password generate of program random

php生成一个随机的密码,方便快捷,可以随机生成安全可靠的密码,希望此文章对大家会有所帮助。

 代码如下 复制代码

header("Content-type:text/html;charset=utf-8");

function getRandPass($length = 6){

 $password = '';

 //将你想要的字符添加到下面字符串中,默认是数字0-9和26个英文字母

 $chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

 $char_len = strlen($chars);

 for($i=0;$i

  $loop = mt_rand(0, ($char_len-1));

  //将这个字符串当作一个数组,随机取出一个字符,并循环拼接成你需要的位数

  $password .= $chars[$loop];

 }

 return $password;

}

echo getRandPass(12); //随机生成一个12位数的密码

 


?>

生成密码哪下

例2,与第一个有一点像

1、预置一个的字符串 $chars ,包括 a – z,A – Z,0 – 9,以及一些特殊字符
2、在 $chars 字符串中随机取一个字符
3、重复第二步 n 次,可得长度为 n 的密码

 代码如下 复制代码

function generate_password( $length = 8 ) {
    // 密码字符集,可任意添加你需要的字符
    $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}~`+=,.;:/?|';

    $password = '';
    for ( $i = 0; $i     {
        // 这里提供两种字符获取方式
        // 第一种是使用 substr 截取$chars中的任意一位字符;
        // 第二种是取字符数组 $chars 的任意元素
        // $password .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        $password .= $chars[ mt_rand(0, strlen($chars) - 1) ];
    }

    return $password;
}

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