[代码] [PHP]代码
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/**
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* “抽奖”函数
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*
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* @param integer $first 起始编号
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* @param integer $last 结束编号
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* @param integer $total 获奖人数
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*
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* @return string
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*
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*/
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function isWinner($first, $last, $total)
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{
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$winner = array();
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for ($i=0;;$i++)
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{
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$number = mt_rand($first, $last);
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if (!in_array($number, $winner))
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$winner[] = $number; // 如果数组中没有该数，将其加入到数组
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if (count($winner) == $total) break;
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}
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return implode(' ', $winner);
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}
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// for test
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echo isWinner(1, 100, 5);
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?>
