//range 是将1到42 列成一个数组
$numbers = range (1,42);
//shuffle 将数组顺序随即打乱 shuffle ($numbers);
//array_slice 取该数组中的某一段 $result = array_slice($numbers,0,3);
print_r($result);
Method 2
$numbers = range (1,20); srand ((float)microtime()*1000000); shuffle ($numbers); while (list (, $number) = each ($numbers)) { echo "$number "; } ?>
Method 3
用PHP,在1-20间随机产生5个不重复的值,如何做
function NoRand($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 } print_r(NoRand()); ?>
或者不shuffle的话
$tmp=array(); while(count($tmp)<5){ $tmp[]=mt_rand(1,20); $tmp=array_unique($tmp); } print join(',',$tmp); ?>