php生成随机密码程序代码
生成随机密码方法有很多种,最简单的就是使用php mt_rand()函数来直接生成一串数字了,下面我来给大家介绍php生成随机密码程序
最简单的办法mt_rand函数
mt_rand() 使用 Mersenne Twister 算法返回随机整数。
例子
在本例中,我们会返回一些随机数:
代码如下 | 复制代码 |
echo(mt_rand()); 输出类似: 3150906288 |
上面相对来说安全指数很低的,因为全是数字哦,下面另名一种
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
代码如下 | 复制代码 |
function generate_password( $length = 8 ) { $password = ''; |
一个朋友提供的md5()函数的返回值的缘故,生成的密码只包括字母和数字,不过也算是一个不错的方法。算法思想:
1、time() 获取当前的 Unix 时间戳
2、将第一步获取的时间戳进行 md5() 加密
3、将第二步加密的结果,截取 n 位即得想要的密码
代码如下 | 复制代码 |
function get_password( $length = 8 ) |

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