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HomeBackend DevelopmentPHP Tutorial生成多个不重复的随机数字php

这个没什么好废话的;直奔主题来说思路;

首先是要用mt_rand()函数生成指定个数的随机数字;

然后使用array_unique()函数去重;

因为去重了;所以得到的数字就不够指定个数了;

所以;核心是要用while循环;直到得到指定个数的数字;

到这里基本可以是结束了;

对于追求完美的人来说;还可以再用个sort();

目的不是要用来排序;主要是将得到的数组key格式化;

用代码来说话;就如下;

/** * 生成不重复的随机数 * @param  int $start  需要生成的数字开始范围 * @param  int $end    结束范围 * @param  int $length 需要生成的随机数个数 * @return array       生成的随机数 */function get_rand_number($start=1,$end=10,$length=4){    $connt=0;    $temp=array();    while($connt<$length){        $temp[]=mt_rand($start,$end);        $data=array_unique($temp);        $connt=count($data);    }    sort($data);    return $data;}

当然;重点不是这个函数;重点是这个函数的思路;可以解决很多类似的问题;


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