指定范围内多个不重复随机数

<br /><?php <br /><br />function unique_random(& $result, $size=6, $min=0, $max=500){<br />    $num = mt_rand($min, $max);<br />    !in_array($num, $result) && array_push($result, $num);<br />    <br />    return count($result) >= $size ? $result : unique_random($result, $size, $min, $max);<br />}<br />$result = array();<br />unique_random($result);<br />print_r($result);<br /><br />

<br />Array<br />(<br />    [0] => 132<br />    [1] => 351<br />    [2] => 43<br />    [3] => 425<br />    [4] => 449<br />    [5] => 269<br />)<br />

<br />$arr = array();<br />for($i=1;$i<=500; $i++){<br />    array_push($arr, $i);<br />}<br /><br />shuffle($arr);<br />$ret = array_slice($arr, 0, 6);<br />print_r($ret);<br />