时间:2021-07-01 10:21:17 帮助过:5人阅读
如何用php生成1-10之间的不重复随机数?
例1,使用shuffle函数生成随机数。
1 |
2 | $arr=range(1,10); |
3 | shuffle($arr); |
4 | foreach($arr as $values) |
5 | { |
6 | echo $values." "; |
7 | } |
8 | ?> |
例2,使用array_unique函数生成随机数。
1 |
2 | $arr=array(); |
3 | while(count($arr)<10) |
4 | { |
5 | $arr[]=rand(1,10); |
6 | $arr=array_unique($arr); |
7 | } |
8 | echo implode(" ",$arr); |
9 | ?> |
例3,使用array_flip函数生成随机数,可以去掉重复值。
01 |
02 | $arr=array(); |
03 | $count1=0; |
04 | $count = 0; |
05 | $return = array(); |
06 | while ($count < 10) |
07 | { |
08 | $return[] = mt_rand(1, 10); |
09 | $return = array_flip(array_flip($return)); |
10 | $count = count($return); |
11 | } //www.jbxue.com |
12 | foreach($return as $value) |
13 | { |
14 | echo $value." "; |
15 | } |
16 | echo " "; |
17 | $arr=array_values($return);// 获得数组的值 |
18 | foreach($arr as $key) |
19 | echo $key." "; |
20 | ?> |
php随机数生成函数示例
01 |
02 | function randpw($len=8,$format='ALL'){ |
03 | $is_abc = $is_numer = 0; |
04 | $password = $tmp =''; |
05 | switch($format){ |
06 | case 'ALL': |
07 | $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; |
08 | break; |
09 | case 'CHAR': |
10 | $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; |
11 | break; |
12 | case 'NUMBER': |
13 | $chars='0123456789'; |
14 | break; |
15 | default : |
16 | $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; |
17 | break; |
18 | } // www.jbxue.com |
19 | mt_srand((double)microtime()*1000000*getmypid()); |
20 | while(strlen($password)<$len){ |
21 | $tmp =substr($chars,(mt_rand()%strlen($chars)),1); |
22 | if(($is_numer <> 1 && is_numeric($tmp) && $tmp > 0 )|| $format == 'CHAR'){ |
23 | $is_numer = 1; |
24 | } |
25 | if(($is_abc <> 1 && preg_match('/[a-zA-Z]/',$tmp)) || $format == 'NUMBER'){ |
26 | $is_abc = 1; |
27 | } |
28 | $password.= $tmp; |
29 | } |
30 | if($is_numer <> 1 || $is_abc <> 1 || empty($password) ){ |
31 | $password = randpw($len,$format); |
32 | } |
33 | return $password; |
34 | } |
35 | for($i = 0 ; $i < 10; $i++){ |
36 | echo randpw(8,'NUMBER'); |
37 | echo " "; |
38 | } |
http://www.bkjia.com/PHPjc/876453.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/876453.htmlTechArticlephp生成随机数的三种方法 如何用php生成1-10之间的不重复随机数? 例1,使用shuffle函数生成随机数。 1 ?php 2 $arr=range(1,10); 3 shuffle($arr); 4 fo...