56 lines
1.5 KiB
PHP
56 lines
1.5 KiB
PHP
<?php
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namespace app\cunkebao\controller;
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class RFMController extends BaseController
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{
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/**
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* 计算 RFM 评分（默认规则）
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* @param int|null $recencyDays 最近购买天数
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* @param int $frequency 购买次数
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* @param float $monetary 购买金额
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* @return array{R:int,F:int,M:int}
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*/
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public static function calcRfmScores($recencyDays = 30, $frequency, $monetary)
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{
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$recencyDays = is_numeric($recencyDays) ? (int)$recencyDays : 9999;
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$frequency = max(0, (int)$frequency);
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$monetary = max(0, (float)$monetary);
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return [
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'R' => self::scoreR_Default($recencyDays),
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'F' => self::scoreF_Default($frequency),
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'M' => self::scoreM_Default($monetary),
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];
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}
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// 默认规则
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protected static function scoreR_Default(int $days): int
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{
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if ($days <= 30) return 5;
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if ($days <= 60) return 4;
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if ($days <= 90) return 3;
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if ($days <= 120) return 2;
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return 1;
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}
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protected static function scoreF_Default(int $times): int
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{
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if ($times >= 10) return 5;
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if ($times >= 6) return 4;
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if ($times >= 3) return 3;
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if ($times >= 2) return 2;
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if ($times >= 1) return 1;
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return 0;
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}
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protected static function scoreM_Default(float $amount): int
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{
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if ($amount >= 2000) return 5;
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if ($amount >= 1000) return 4;
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if ($amount >= 500) return 3;
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if ($amount >= 200) return 2;
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if ($amount > 0) return 1;
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return 0;
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}
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}
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