在php中生成随机数据我们可以使用rand,mt_rand都可以生成指定范围内随机数据了,下面小编来给各位同学介绍一下方法。
调用mt_rand()这个方法可以生成随机数字,参数是范围的最小值和最大值,函数会返回最小值和最大值之间的一个随机数字。
要生成真正的随机数,对于计算来说不是一件容易的事,php中两种方法可以生成随机数,一个经典的函数叫rand(),另一个更出色的函数是mt_rand()。
例1代码如下:
- $random =rand(0,1000);
- //或者
- <?php
- $rand = mt_rand(1, 100);
- echo $rand;
- ?>
例2代码如下:
- srand((double)microtime()*1000000);
- $random =rand(0,1000);
例3代码如下:
- /**
- *获取一定范围内的多个随机数字
- */
- function yang_numberRand($begin = 0, $end = 20, $limit = 5){
- $rand_array = range($begin, $end);
- shuffle($rand_array); //调用现成的数组随机排列函数
- return array_slice($rand_array, 0, $limit); //截取前$limit个
- }
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波比源码 » php指定范围内多个随机数
波比源码 » php指定范围内多个随机数
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