21段救命PHP代码

1. PHP可阅读随机字符串
　　此代码将创建一个可阅读的字符串，使其更接近词典中的单词，实用且具有密码验证功能。
        /**************
        *@length - length of random string (must be a multiple of 2)
        **************/
        function readable_random_string($length = 6){
                $conso=array("b","c","d","f","g","h","j","k","l",
                "m","n","p","r","s","t","v","w","x","y","z");
                $vocal=array("a","e","i","o","u");
                $password="";
                srand ((double)microtime()*1000000);
                $max = $length/2;
                for($i=1; $i<=$max; $i++)
                {
                $password.=$conso[rand(0,19)];
                $password.=$vocal[rand(0,4)];
                }
                return $password;
        }

2. PHP生成一个随机字符串
　　如果不需要可阅读的字符串，使用此函数替代，即可创建一个随机字符串，作为用户的随机密码等。
2. PHP生成一个随机字符串

    如果不需要可阅读的字符串，使用此函数替代，即可创建一个随机字符串，作为用户的随机密码等。

        /*************
        *@l - length of random string
        */
        function generate_rand($l){
            $c= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
            srand((double)microtime()*1000000);