29 lines
532 B
PHP
29 lines
532 B
PHP
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<?php
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if (!defined('IN_ECS'))
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{
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die('Hacking attempt');
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}
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function getRand($proArr) {
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$result = '';
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//概率數組的總概率精度
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$proSum = array_sum($proArr);
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//概率數組循環
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foreach ($proArr as $key => $proCur) {
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$randNum = mt_rand(1, $proSum);
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if ($randNum <= $proCur) {
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$result = $key;
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break;
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} else {
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$proSum -= $proCur;
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}
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}
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unset ($proArr);
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return $result;
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}
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?>
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