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<?php |
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namespace Stu\Module\Control; |
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use RuntimeException; |
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/** |
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* This class adds the possibility to inject a random generator |
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*/ |
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class StuRandom |
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{ |
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1 |
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public function rand( |
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int $min, |
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int $max, |
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bool $useStandardNormalDistribution = false, |
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?int $mean = null, |
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float $skewness = 0 |
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): int { |
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1 |
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if ($skewness != 0 && $useStandardNormalDistribution) { |
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return $this->generateRandomValueAsymmetricDistribution($min, $max, $mean, $skewness); |
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} |
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if ($useStandardNormalDistribution) { |
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return $this->generateRandomValueStandardNormalDistribution($min, $max, $mean); |
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} |
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return random_int($min, $max); |
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} |
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/** |
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* Return a random key from the given array. |
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* |
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* @template TKey of int|string |
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* @param array<TKey, mixed> $array The array to pick a key from. |
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* @return TKey A randomly selected key from the array. |
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*/ |
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public function array_rand(array $array): string|int |
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{ |
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if ($array === []) { |
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throw new RuntimeException('Cannot pick a random key from an empty array'); |
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} |
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/** @var TKey of int|string */ |
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$result = array_rand($array); |
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return $result; |
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} |
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/** @param array<int, int> $probabilities */ |
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public function randomKeyOfProbabilities(array $probabilities): int |
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{ |
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$totalProbability = array_sum($probabilities); |
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$randomNumber = random_int(1, $totalProbability); |
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$cumulativeProbability = 0; |
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foreach ($probabilities as $key => $prob) { |
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$cumulativeProbability += $prob; |
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if ($randomNumber <= $cumulativeProbability) { |
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return $key; |
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} |
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} |
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throw new RuntimeException('this should not happen'); |
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} |
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public function uniqid(): string |
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{ |
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return uniqid(); |
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} |
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private function generateRandomValueStandardNormalDistribution(int $min, int $max, ?int $mean): int |
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{ |
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$usedMean = $mean ?? ($min + $max) / 2; // MW |
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$stdDeviation = $usedMean / 2.5; // FWHM |
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do { |
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$value = random_int($min, $max); |
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$probability = exp(-0.5 * (($value - $usedMean) / $stdDeviation) ** 2); // normal distribution |
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$randomProbability = random_int(0, mt_getrandmax()) / mt_getrandmax(); |
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if ($randomProbability <= $probability) { |
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return $value; |
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} |
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1 |
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} while (true); |
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} |
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private function generateRandomValueAsymmetricDistribution(int $min, int $max, ?int $mean = null, float $skewness = 0): int |
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{ |
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$usedMean = $mean ?? ($min + $max) / 2; |
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$stdDeviation = ($max - $min) / 6; |
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do { |
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$value = random_int($min, $max); |
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$probability = exp(-0.5 * (($value - $usedMean) / $stdDeviation) ** 2); |
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if ($skewness !== 0.0) { |
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$skewFactor = 1 + $skewness * (($value - $usedMean) / ($max - $min)); |
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$probability *= max(0, $skewFactor); |
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} |
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$randomProbability = random_int(0, mt_getrandmax()) / mt_getrandmax(); |
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if ($randomProbability <= $probability) { |
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return $value; |
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} |
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} while (true); |
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} |
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} |
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st-universe /
core
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The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g.
excluded_paths: ["lib/*"], you can move it to the dependency path list as follows:For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths