原帖已经结贴。只是获得的结果并不完美，总是最大数999重复太多，显得不够随机，有点假。
http://bbs.csdn.net/topics/391814341
$r = foo(32898, 53);echo array_sum($r), PHP_EOL; //验证总和print_r(array_count_values($r)); //查看分布function foo($num, $k, $min=1, $max=999) { $res = array_fill(0, $k, 1); do { for($i=0; $i<$k; $i++) { $sum = array_sum($res); $t = rand(0, $max - $min); if($res[$i] + $t > $max) $t = $max - $res[$i]; if($sum + $t > $num) $t = $num - $sum; $res[$i] += $t; } }while($num > $sum); return $res;}
$t = rand(0, $max - $min);
改为
$t = rand(0, $max - $res[$i]);
这样的分布应该很好了
Array( [886] => 1 [760] => 1 [470] => 1 [875] => 1 [591] => 1 [499] => 1 [257] => 1 [954] => 1 [264] => 1 [615] => 1 [770] => 1 [644] => 1 [971] => 1 [979] => 1 [259] => 1 [906] => 1 [830] => 1 [537] => 1 [595] => 1 [531] => 1 [588] => 1 [748] => 1 [767] => 1 [844] => 1 [931] => 1 [835] => 1 [986] => 1 [976] => 1 [89] => 1 [157] => 1 [408] => 1 [582] => 1 [593] => 1 [876] => 1 [710] => 1 [130] => 1 [554] => 1 [774] => 1 [386] => 1 [339] => 1 [686] => 1 [194] => 1 [903] => 1 [304] => 1 [207] => 1 [978] => 1 [232] => 1 [618] => 1 [834] => 1 [472] => 1 [839] => 1 [377] => 1 [788] => 1)
