rector: codingStyle

benchmark/BasicBench.php

@@ -30,7 +30,7 @@ class BasicBench
         $team1 = new Team($p1, $gameInfo->getDefaultRating());
         $team2 = new Team($p2, $gameInfo->getDefaultRating());
 
-        for ($i = 0; $i < 10; $i++) {
+        for ($i = 0; $i < 10; ++$i) {
             $teams = Teams::concat($team1, $team2);
 
             $calculator = new TwoPlayerTrueSkillCalculator();
@@ -61,7 +61,7 @@ class BasicBench
         $team1 = new Team($p1, $gameInfo->getDefaultRating());
         $team2 = new Team($p2, $gameInfo->getDefaultRating());
 
-        for ($i = 0; $i < 10; $i++) {
+        for ($i = 0; $i < 10; ++$i) {
             $teams = Teams::concat($team1, $team2);
 
             $calculator = new TwoTeamTrueSkillCalculator();
@@ -92,7 +92,7 @@ class BasicBench
         $team1 = new Team($p1, $gameInfo->getDefaultRating());
         $team2 = new Team($p2, $gameInfo->getDefaultRating());
 
-        for ($i = 0; $i < 10; $i++) {
+        for ($i = 0; $i < 10; ++$i) {
             $teams = Teams::concat($team1, $team2);
 
             $calculator = new FactorGraphTrueSkillCalculator();
@@ -125,7 +125,7 @@ class BasicBench
         $team2 = new Team($p2, $gameInfo->getDefaultRating());
         $team3 = new Team($p3, $gameInfo->getDefaultRating());
         
-        for ($i = 0; $i < 10; $i++) {
+        for ($i = 0; $i < 10; ++$i) {
             $teams = Teams::concat($team1, $team2, $team3);
 
             $calculator = new FactorGraphTrueSkillCalculator();

examples/3teams.php

@@ -20,8 +20,8 @@ $team2 = new Team($p2, $gameInfo->getDefaultRating());
 $team3 = new Team($p3, $gameInfo->getDefaultRating());
 
 
-for($i = 0; $i < 5; $i++) {
+for($i = 0; $i < 5; ++$i) {
-    echo "Iteration: $i\n";
+    echo "Iteration: " . $i . PHP_EOL;
     $teams = Teams::concat($team1, $team2, $team3);
 
     $calculator = new FactorGraphTrueSkillCalculator();

examples/basic.php

@@ -19,8 +19,8 @@ $team1 = new Team($p1, $gameInfo->getDefaultRating());
 $team2 = new Team($p2, $gameInfo->getDefaultRating());
 
 
-for($i = 0; $i < 5; $i++) {
+for($i = 0; $i < 5; ++$i) {
-    echo "Iteration: $i\n";
+    echo "Iteration: " . $i . PHP_EOL;
     $teams = Teams::concat($team1, $team2);
 
     $calculator = new TwoPlayerTrueSkillCalculator();

rector.php

@@ -14,7 +14,7 @@ return RectorConfig::configure()
     ])
     // uncomment to reach your current PHP version
     ->withPhpSets()
-    ->withPreparedSets(deadCode: true, codeQuality: true, typeDeclarations : true)
+    ->withPreparedSets(deadCode: true, codeQuality: true, codingStyle: true, typeDeclarations : true)
     ->withSkip([
         LocallyCalledStaticMethodToNonStaticRector::class,
     ]);;

src/FactorGraphs/FactorGraphLayer.php

@@ -18,6 +18,7 @@ abstract class FactorGraphLayer
      * @var array<int,array<int,object>>
      */
     private array $outputVariablesGroups = [];
+
     /**
      * @var array<int,array<int,object>>
      */

src/FactorGraphs/FactorList.php

@@ -25,12 +25,12 @@ class FactorList
 
         $listCount = count($this->list);
 
-        for ($i = 0; $i < $listCount; $i++) {
+        for ($i = 0; $i < $listCount; ++$i) {
             $f = $this->list[$i];
 
             $numberOfMessages = $f->getNumberOfMessages();
 
-            for ($j = 0; $j < $numberOfMessages; $j++) {
+            for ($j = 0; $j < $numberOfMessages; ++$j) {
                 $sumLogZ += $f->sendMessageIndex($j);
             }
         }

src/Numerics/DiagonalMatrix.php

@@ -15,8 +15,8 @@ class DiagonalMatrix extends Matrix
 
         parent::__construct($diagonalCount, $diagonalCount);
 
-        for ($currentRow = 0; $currentRow < $diagonalCount; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $diagonalCount; ++$currentRow) {
-            for ($currentCol = 0; $currentCol < $diagonalCount; $currentCol++) {
+            for ($currentCol = 0; $currentCol < $diagonalCount; ++$currentCol) {
                 if ($currentRow === $currentCol) {
                     $this->setValue($currentRow, $currentCol, $diagonalValues[$currentRow]);
                 } else {

src/Numerics/GaussianDistribution.php

@@ -15,10 +15,11 @@ class GaussianDistribution implements \Stringable
     //sqrt(2*pi)
     //from https://www.wolframalpha.com/input?i=sqrt%282*pi%29
     private const M_SQRT_2_PI = 2.5066282746310005024157652848110452530069867406099383166299235763;
-    
+
     //log(sqrt(2*pi))
     //From https://www.wolframalpha.com/input?i=log%28sqrt%282*pi%29%29
     private const M_LOG_SQRT_2_PI = 0.9189385332046727417803297364056176398613974736377834128171515404;
+
     // precision and precisionMean are used because they make multiplying and dividing simpler
     // (the the accompanying math paper for more details)
     private float $precision;
@@ -209,7 +210,7 @@ class GaussianDistribution implements \Stringable
         $d = 0.0;
         $dd = 0.0;
 
-        for ($j = $ncof - 1; $j > 0; $j--) {
+        for ($j = $ncof - 1; $j > 0; --$j) {
             $tmp = $d;
             $d = $ty * $d - $dd + $coefficients[$j];
             $dd = $tmp;
@@ -227,6 +228,7 @@ class GaussianDistribution implements \Stringable
         if ($p >= 2.0) {
             return -100;
         }
+
         if ($p <= 0.0) {
             return 100;
         }
@@ -235,7 +237,7 @@ class GaussianDistribution implements \Stringable
         $t = sqrt(-2 * log($pp / 2.0)); // Initial guess
         $x = -M_SQRT1_2 * ((2.30753 + $t * 0.27061) / (1.0 + $t * (0.99229 + $t * 0.04481)) - $t);
 
-        for ($j = 0; $j < 2; $j++) {
+        for ($j = 0; $j < 2; ++$j) {
             $err = GaussianDistribution::errorFunctionCumulativeTo($x) - $pp;
             $x += $err / (M_2_SQRTPI * exp(-BasicMath::square($x)) - $x * $err); // Halley
         }

src/Numerics/Matrix.php

@@ -25,10 +25,10 @@ class Matrix
         $data = [];
         $result = new Matrix($rows, $columns, $data);
 
-        for ($currentColumn = 0; $currentColumn < $columns; $currentColumn++) {
+        for ($currentColumn = 0; $currentColumn < $columns; ++$currentColumn) {
             $currentColumnData = $columnValues[$currentColumn];
 
-            for ($currentRow = 0; $currentRow < $rows; $currentRow++) {
+            for ($currentRow = 0; $currentRow < $rows; ++$currentRow) {
                 $result->setValue($currentRow, $currentColumn, $currentColumnData[$currentRow]);
             }
         }
@@ -41,8 +41,8 @@ class Matrix
         $result = new Matrix($rows, $cols);
         $currentIndex = 0;
 
-        for ($currentRow = 0; $currentRow < $rows; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $rows; ++$currentRow) {
-            for ($currentCol = 0; $currentCol < $cols; $currentCol++) {
+            for ($currentCol = 0; $currentCol < $cols; ++$currentCol) {
                 $result->setValue($currentRow, $currentCol, $args[$currentIndex++]);
             }
         }
@@ -76,8 +76,8 @@ class Matrix
         $transposeMatrix = [];
 
         $rowMatrixData = $this->matrixRowData;
-        for ($currentRowTransposeMatrix = 0; $currentRowTransposeMatrix < $this->columnCount; $currentRowTransposeMatrix++) {
+        for ($currentRowTransposeMatrix = 0; $currentRowTransposeMatrix < $this->columnCount; ++$currentRowTransposeMatrix) {
-            for ($currentColumnTransposeMatrix = 0; $currentColumnTransposeMatrix < $this->rowCount; $currentColumnTransposeMatrix++) {
+            for ($currentColumnTransposeMatrix = 0; $currentColumnTransposeMatrix < $this->rowCount; ++$currentColumnTransposeMatrix) {
                 $transposeMatrix[$currentRowTransposeMatrix][$currentColumnTransposeMatrix] =
                     $rowMatrixData[$currentColumnTransposeMatrix][$currentRowTransposeMatrix];
             }
@@ -126,7 +126,7 @@ class Matrix
         $result = 0.0;
 
         // I expand along the first row
-        for ($currentColumn = 0; $currentColumn < $this->columnCount; $currentColumn++) {
+        for ($currentColumn = 0; $currentColumn < $this->columnCount; ++$currentColumn) {
             $firstRowColValue = $this->matrixRowData[0][$currentColumn];
             $cofactor = $this->getCofactor(0, $currentColumn);
             $itemToAdd = $firstRowColValue * $cofactor;
@@ -168,8 +168,8 @@ class Matrix
         // The idea is that it's the transpose of the cofactors
         $result = [];
 
-        for ($currentColumn = 0; $currentColumn < $this->columnCount; $currentColumn++) {
+        for ($currentColumn = 0; $currentColumn < $this->columnCount; ++$currentColumn) {
-            for ($currentRow = 0; $currentRow < $this->rowCount; $currentRow++) {
+            for ($currentRow = 0; $currentRow < $this->rowCount; ++$currentRow) {
                 $result[$currentColumn][$currentRow] = $this->getCofactor($currentRow, $currentColumn);
             }
         }
@@ -197,8 +197,8 @@ class Matrix
         $columns = $matrix->getColumnCount();
         $newValues = [];
 
-        for ($currentRow = 0; $currentRow < $rows; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $rows; ++$currentRow) {
-            for ($currentColumn = 0; $currentColumn < $columns; $currentColumn++) {
+            for ($currentColumn = 0; $currentColumn < $columns; ++$currentColumn) {
                 $newValues[$currentRow][$currentColumn] = $scalarValue * $matrix->getValue($currentRow, $currentColumn);
             }
         }
@@ -216,8 +216,8 @@ class Matrix
 
         $resultMatrix = [];
 
-        for ($currentRow = 0; $currentRow < $left->getRowCount(); $currentRow++) {
+        for ($currentRow = 0; $currentRow < $left->getRowCount(); ++$currentRow) {
-            for ($currentColumn = 0; $currentColumn < $right->getColumnCount(); $currentColumn++) {
+            for ($currentColumn = 0; $currentColumn < $right->getColumnCount(); ++$currentColumn) {
                 $resultMatrix[$currentRow][$currentColumn] =
                     $left->getValue($currentRow, $currentColumn)
                     +
@@ -242,11 +242,11 @@ class Matrix
 
         $resultMatrix = [];
 
-        for ($currentRow = 0; $currentRow < $resultRows; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $resultRows; ++$currentRow) {
-            for ($currentColumn = 0; $currentColumn < $resultColumns; $currentColumn++) {
+            for ($currentColumn = 0; $currentColumn < $resultColumns; ++$currentColumn) {
                 $productValue = 0;
 
-                for ($vectorIndex = 0; $vectorIndex < $left->getColumnCount(); $vectorIndex++) {
+                for ($vectorIndex = 0; $vectorIndex < $left->getColumnCount(); ++$vectorIndex) {
                     $leftValue = $left->getValue($currentRow, $vectorIndex);
                     $rightValue = $right->getValue($vectorIndex, $currentColumn);
                     $vectorIndexProduct = $leftValue * $rightValue;
@@ -269,24 +269,24 @@ class Matrix
 
         $actualRow = 0;
 
-        for ($currentRow = 0; $currentRow < $this->rowCount; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $this->rowCount; ++$currentRow) {
             if ($currentRow == $rowToRemove) {
                 continue;
             }
 
             $actualCol = 0;
 
-            for ($currentColumn = 0; $currentColumn < $this->columnCount; $currentColumn++) {
+            for ($currentColumn = 0; $currentColumn < $this->columnCount; ++$currentColumn) {
                 if ($currentColumn == $columnToRemove) {
                     continue;
                 }
 
                 $result[$actualRow][$actualCol] = $this->matrixRowData[$currentRow][$currentColumn];
 
-                $actualCol++;
+                ++$actualCol;
             }
 
-            $actualRow++;
+            ++$actualRow;
         }
 
         return new Matrix($this->rowCount - 1, $this->columnCount - 1, $result);
@@ -312,8 +312,8 @@ class Matrix
             return FALSE;
         }
 
-        for ($currentRow = 0; $currentRow < $this->rowCount; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $this->rowCount; ++$currentRow) {
-            for ($currentColumn = 0; $currentColumn < $this->columnCount; $currentColumn++) {
+            for ($currentColumn = 0; $currentColumn < $this->columnCount; ++$currentColumn) {
                 $delta =
                     abs(
                         $this->matrixRowData[$currentRow][$currentColumn] -

src/Numerics/SquareMatrix.php

@@ -13,8 +13,8 @@ class SquareMatrix extends Matrix
         $matrixData = [];
         $allValuesIndex = 0;
 
-        for ($currentRow = 0; $currentRow < $size; $currentRow++) {
+        for ($currentRow = 0; $currentRow < $size; ++$currentRow) {
-            for ($currentColumn = 0; $currentColumn < $size; $currentColumn++) {
+            for ($currentColumn = 0; $currentColumn < $size; ++$currentColumn) {
                 $matrixData[$currentRow][$currentColumn] = $allValues[$allValuesIndex++];
             }
         }

src/Numerics/Vector.php

@@ -15,6 +15,7 @@ class Vector extends Matrix
         foreach ($vectorValues as $currentVectorValue) {
             $columnValues[] = [$currentVectorValue];
         }
+
         parent::__construct(count($vectorValues), 1, $columnValues);
     }
 }

src/SkillCalculator.php

@@ -70,7 +70,8 @@ abstract class SkillCalculator
             if (! $playersPerTeam->isInRange($currentTeam->count())) {
                 throw new Exception('Player count is not in range');
             }
-            $countOfTeams++;
+
+            ++$countOfTeams;
         }
 
         if (! $totalTeams->isInRange($countOfTeams)) {

src/TrueSkill/FactorGraphTrueSkillCalculator.php

@@ -29,6 +29,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
     {
         parent::__construct(SkillCalculatorSupportedOptions::PARTIAL_PLAY | SkillCalculatorSupportedOptions::PARTIAL_UPDATE, TeamsRange::atLeast(2), PlayersRange::atLeast(1));
     }
+
     /**
      * {@inheritdoc}
      */
@@ -51,6 +52,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
 
         return $factorGraph->getUpdatedRatings();
     }
+
     /**
      * {@inheritdoc}
      */
@@ -104,7 +106,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
         return new Vector(
             self::getPlayerRatingValues(
                 $teamAssignmentsList,
-                fn (Rating $rating): float => $rating->getMean()
+                static fn(Rating $rating): float => $rating->getMean()
             )
         );
     }
@@ -119,7 +121,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
         return new DiagonalMatrix(
             self::getPlayerRatingValues(
                 $teamAssignmentsList,
-                fn (Rating $rating): float => BasicMath::square($rating->getStandardDeviation())
+                static fn(Rating $rating): float => BasicMath::square($rating->getStandardDeviation())
             )
         );
     }
@@ -171,7 +173,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
 
         $currentColumn = 0;
 
-        for ($i = 0; $i < count($teamAssignmentsList) - 1; $i++) {
+        for ($i = 0; $i < count($teamAssignmentsList) - 1; ++$i) {
             $currentTeam = $teamAssignmentsList[$i];
 
             // Need to add in 0's for all the previous players, since they're not
@@ -181,7 +183,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
             foreach ($currentTeam->getAllPlayers() as $currentPlayer) {
                 $playerAssignments[$currentColumn][] = PartialPlay::getPartialPlayPercentage($currentPlayer);
                 // indicates the player is on the team
-                $totalPreviousPlayers++;
+                ++$totalPreviousPlayers;
             }
 
             $rowsRemaining = $totalPlayers - $totalPreviousPlayers;
@@ -190,15 +192,15 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
             foreach ($nextTeam->getAllPlayers() as $nextTeamPlayer) {
                 // Add a -1 * playing time to represent the difference
                 $playerAssignments[$currentColumn][] = -1 * PartialPlay::getPartialPlayPercentage($nextTeamPlayer);
-                $rowsRemaining--;
+                --$rowsRemaining;
             }
 
-            for ($ixAdditionalRow = 0; $ixAdditionalRow < $rowsRemaining; $ixAdditionalRow++) {
+            for ($ixAdditionalRow = 0; $ixAdditionalRow < $rowsRemaining; ++$ixAdditionalRow) {
                 // Pad with zeros
                 $playerAssignments[$currentColumn][] = 0;
             }
 
-            $currentColumn++;
+            ++$currentColumn;
         }
 
         return Matrix::fromColumnValues($totalPlayers, count($teamAssignmentsList) - 1, $playerAssignments);

src/TrueSkill/Factors/GaussianWeightedSumFactor.php

@@ -30,6 +30,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
      * @var array<float[]> $weights
      */
     private array $weights = [];
+
     /**
      * @var array<float[]> $weightsSquared
      */
@@ -48,7 +49,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         $variableWeightsLength = count($variableWeights);
         $this->weights[0] = array_fill(0, count($variableWeights), 0);
 
-        for ($i = 0; $i < $variableWeightsLength; $i++) {
+        for ($i = 0; $i < $variableWeightsLength; ++$i) {
             $weight = &$variableWeights[$i];
             $this->weights[0][$i] = $weight;
             $this->weightsSquared[0][$i] = BasicMath::square($weight);
@@ -58,7 +59,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
 
         // 0..n-1
         $this->variableIndexOrdersForWeights[0] = [];
-        for ($i = 0; $i < ($variablesToSumLength + 1); $i++) {
+        for ($i = 0; $i < ($variablesToSumLength + 1); ++$i) {
             $this->variableIndexOrdersForWeights[0][] = $i;
         }
 
@@ -70,7 +71,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         // By convention, we'll put the v_0 term at the end
 
         $weightsLength = $variableWeightsLength + 1;
-        for ($weightsIndex = 1; $weightsIndex < $weightsLength; $weightsIndex++) {
+        for ($weightsIndex = 1; $weightsIndex < $weightsLength; ++$weightsIndex) {
             $currentWeights = \array_fill(0, $variableWeightsLength, 0);
 
             $variableIndices = \array_fill(0, $variableWeightsLength + 1, 0);
@@ -82,7 +83,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
             // This is helpful since we skip over one of the spots
             $currentDestinationWeightIndex = 0;
 
-            for ($currentWeightSourceIndex = 0; $currentWeightSourceIndex < $variableWeightsLength; $currentWeightSourceIndex++) {
+            for ($currentWeightSourceIndex = 0; $currentWeightSourceIndex < $variableWeightsLength; ++$currentWeightSourceIndex) {
                 if ($currentWeightSourceIndex === $weightsIndex - 1) {
                     continue;
                 }
@@ -98,7 +99,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
                 $currentWeightsSquared[$currentDestinationWeightIndex] = $currentWeight * $currentWeight;
 
                 $variableIndices[$currentDestinationWeightIndex + 1] = $currentWeightSourceIndex + 1;
-                $currentDestinationWeightIndex++;
+                ++$currentDestinationWeightIndex;
             }
 
             // And the final one
@@ -108,6 +109,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
                 // HACK: Getting around division by zero
                 $finalWeight = 0;
             }
+
             $currentWeights[$currentDestinationWeightIndex] = $finalWeight;
             $currentWeightsSquared[$currentDestinationWeightIndex] = BasicMath::square($finalWeight);
             $variableIndices[count($variableWeights)] = 0;
@@ -135,7 +137,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         $counter = count($vars);
 
         // We start at 1 since offset 0 has the sum
-        for ($i = 1; $i < $counter; $i++) {
+        for ($i = 1; $i < $counter; ++$i) {
             $result += GaussianDistribution::logRatioNormalization($vars[$i]->getValue(), $messages[$i]->getValue());
         }
 
@@ -164,7 +166,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
 
         $weightsSquaredLength = count($weightsSquared);
 
-        for ($i = 0; $i < $weightsSquaredLength; $i++) {
+        for ($i = 0; $i < $weightsSquaredLength; ++$i) {
             // These flow directly from the paper
 
             $inverseOfNewPrecisionSum += $weightsSquared[$i] /
@@ -221,7 +223,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         // The tricky part here is that we have to put the messages and variables in the same
         // order as the weights. Thankfully, the weights and messages share the same index numbers,
         // so we just need to make sure they're consistent
-        for ($i = 0; $i < $counter; $i++) {
+        for ($i = 0; $i < $counter; ++$i) {
             $updatedMessages[] = $allMessages[$indicesToUse[$i]];
             $updatedVariables[] = $allVariables[$indicesToUse[$i]];
         }
@@ -245,7 +247,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         $result .= ' = ';
 
         $totalVars = count($variablesToSum);
-        for ($i = 0; $i < $totalVars; $i++) {
+        for ($i = 0; $i < $totalVars; ++$i) {
             $isFirst = ($i == 0);
 
             if ($isFirst && ($weights[$i] < 0)) {

src/TrueSkill/Layers/IteratedTeamDifferencesInnerLayer.php

@@ -113,7 +113,7 @@ class IteratedTeamDifferencesInnerLayer extends TrueSkillFactorGraphLayer
 
         $forwardScheduleList = [];
 
-        for ($i = 0; $i < $totalTeamDifferences - 1; $i++) {
+        for ($i = 0; $i < $totalTeamDifferences - 1; ++$i) {
             $teamPerformancesToTeamPerformanceDifferencesLayerLocalFactors = $this->TeamPerformancesToTeamPerformanceDifferencesLayer->getLocalFactors();
             $teamDifferencesComparisonLayerLocalFactors = $this->TeamDifferencesComparisonLayer->getLocalFactors();
 
@@ -149,7 +149,7 @@ class IteratedTeamDifferencesInnerLayer extends TrueSkillFactorGraphLayer
 
         $backwardScheduleList = [];
 
-        for ($i = 0; $i < $totalTeamDifferences - 1; $i++) {
+        for ($i = 0; $i < $totalTeamDifferences - 1; ++$i) {
             $teamPerformancesToTeamPerformanceDifferencesLayerLocalFactors = $this->TeamPerformancesToTeamPerformanceDifferencesLayer->getLocalFactors();
             $teamDifferencesComparisonLayerLocalFactors = $this->TeamDifferencesComparisonLayer->getLocalFactors();
 

src/TrueSkill/Layers/PlayerPerformancesToTeamPerformancesLayer.php

@@ -37,7 +37,7 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
 
         return $this->scheduleSequence(
             array_map(
-                fn ($weightedSumFactor): ScheduleStep => new ScheduleStep('Perf to Team Perf Step', $weightedSumFactor, 0),
+                static fn($weightedSumFactor): ScheduleStep => new ScheduleStep('Perf to Team Perf Step', $weightedSumFactor, 0),
                 $localFactors
             ),
             'all player perf to team perf schedule'
@@ -50,9 +50,8 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
     protected function createPlayerToTeamSumFactor(array $teamMembers, Variable $sumVariable): GaussianWeightedSumFactor
     {
         $weights = array_map(
-            function ($v): float {
+            static function ($v): float {
                 $player = $v->getKey();
-
                 return PartialPlay::getPartialPlayPercentage($player);
             },
             $teamMembers
@@ -72,7 +71,7 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
         foreach ($localFactors as $currentFactor) {
             $localCurrentFactor = $currentFactor;
             $numberOfMessages = $localCurrentFactor->getNumberOfMessages();
-            for ($currentIteration = 1; $currentIteration < $numberOfMessages; $currentIteration++) {
+            for ($currentIteration = 1; $currentIteration < $numberOfMessages; ++$currentIteration) {
                 $allFactors[] = new ScheduleStep(
                     'team sum perf @' . $currentIteration,
                     $localCurrentFactor,
@@ -89,7 +88,7 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
      */
     private function createOutputVariable(array $team): Variable
     {
-        $memberNames = array_map(fn ($currentPlayer): string => (string)($currentPlayer->getKey()), $team);
+        $memberNames = array_map(static fn($currentPlayer): string => (string)($currentPlayer->getKey()), $team);
 
         $teamMemberNames = \implode(', ', $memberNames);
 

src/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php

@@ -55,7 +55,7 @@ class PlayerPriorValuesToSkillsLayer extends TrueSkillFactorGraphLayer
 
         return $this->scheduleSequence(
             array_map(
-                fn ($prior): ScheduleStep => new ScheduleStep('Prior to Skill Step', $prior, 0),
+                static fn($prior): ScheduleStep => new ScheduleStep('Prior to Skill Step', $prior, 0),
                 $localFactors
             ),
             'All priors'

src/TrueSkill/Layers/PlayerSkillsToPerformancesLayer.php

@@ -53,7 +53,7 @@ class PlayerSkillsToPerformancesLayer extends TrueSkillFactorGraphLayer
 
         return $this->scheduleSequence(
             array_map(
-                fn ($likelihood): ScheduleStep => new ScheduleStep('Skill to Perf step', $likelihood, 0),
+                static fn($likelihood): ScheduleStep => new ScheduleStep('Skill to Perf step', $likelihood, 0),
                 $localFactors
             ),
             'All skill to performance sending'
@@ -66,7 +66,7 @@ class PlayerSkillsToPerformancesLayer extends TrueSkillFactorGraphLayer
 
         return $this->scheduleSequence(
             array_map(
-                fn ($likelihood): ScheduleStep => new ScheduleStep('name', $likelihood, 1),
+                static fn($likelihood): ScheduleStep => new ScheduleStep('name', $likelihood, 1),
                 $localFactors
             ),
             'All skill to performance sending'

src/TrueSkill/Layers/TeamDifferencesComparisonLayer.php

@@ -28,7 +28,7 @@ class TeamDifferencesComparisonLayer extends TrueSkillFactorGraphLayer
         $inputVarGroups = $this->getInputVariablesGroups();
         $inputVarGroupsCount = count($inputVarGroups);
 
-        for ($i = 0; $i < $inputVarGroupsCount; $i++) {
+        for ($i = 0; $i < $inputVarGroupsCount; ++$i) {
             $isDraw = ($this->teamRanks[$i] == $this->teamRanks[$i + 1]);
             $teamDifference = $inputVarGroups[$i][0];
 

src/TrueSkill/Layers/TeamPerformancesToTeamPerformanceDifferencesLayer.php

@@ -15,7 +15,7 @@ class TeamPerformancesToTeamPerformanceDifferencesLayer extends TrueSkillFactorG
         $inputVariablesGroupsCount = count($inputVariablesGroups);
         $outputVariablesGroup = &$this->getOutputVariablesGroups();
 
-        for ($i = 0; $i < $inputVariablesGroupsCount - 1; $i++) {
+        for ($i = 0; $i < $inputVariablesGroupsCount - 1; ++$i) {
             $strongerTeam = $inputVariablesGroups[$i][0];
             $weakerTeam = $inputVariablesGroups[$i + 1][0];
 

src/TrueSkill/TrueSkillFactorGraph.php

@@ -39,7 +39,7 @@ class TrueSkillFactorGraph extends FactorGraph
     {
         $this->priorLayer = new PlayerPriorValuesToSkillsLayer($this, $teams);
         $newFactory = new VariableFactory(
-            fn (): GaussianDistribution => GaussianDistribution::fromPrecisionMean(0, 0)
+            static fn(): GaussianDistribution => GaussianDistribution::fromPrecisionMean(0, 0)
         );
 
         $this->setVariableFactory($newFactory);

src/TrueSkill/TwoTeamTrueSkillCalculator.php

@@ -28,6 +28,7 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
     {
         parent::__construct(SkillCalculatorSupportedOptions::NONE, TeamsRange::exactly(2), PlayersRange::atLeast(1));
     }
+
     /**
      * {@inheritdoc}
      */
@@ -82,12 +83,12 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
 
         $totalPlayers = $selfTeam->count() + $otherTeam->count();
 
-        $meanGetter = fn (Rating $currentRating): float => $currentRating->getMean();
+        $meanGetter = static fn(Rating $currentRating): float => $currentRating->getMean();
 
         $selfMeanSum = BasicMath::sum($selfTeam->getAllRatings(), $meanGetter);
         $otherTeamMeanSum = BasicMath::sum($otherTeam->getAllRatings(), $meanGetter);
 
-        $varianceGetter = fn (Rating $currentRating): float => BasicMath::square($currentRating->getStandardDeviation());
+        $varianceGetter = static fn(Rating $currentRating): float => BasicMath::square($currentRating->getStandardDeviation());
 
         $c = sqrt(
             BasicMath::sum($selfTeam->getAllRatings(), $varianceGetter)
@@ -163,9 +164,9 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
 
         $betaSquared = BasicMath::square($gameInfo->getBeta());
 
-        $meanGetter = fn (Rating $currentRating): float => $currentRating->getMean();
+        $meanGetter = static fn(Rating $currentRating): float => $currentRating->getMean();
 
-        $varianceGetter = fn (Rating $currentRating): float => BasicMath::square($currentRating->getStandardDeviation());
+        $varianceGetter = static fn(Rating $currentRating): float => BasicMath::square($currentRating->getStandardDeviation());
 
         $team1MeanSum = BasicMath::sum($team1Ratings, $meanGetter);
         $team1StdDevSquared = BasicMath::sum($team1Ratings, $varianceGetter);

tests/Numerics/BasicMathTest.php

@@ -20,8 +20,8 @@ class BasicMathTest extends TestCase
     {
         $arr = [1, 1, 1, 1];
 
-        $func_return = fn(float $f): float => $f;
+        $func_return = static fn(float $f): float => $f;
-        $func_double = fn(float $f): float => $f * 2;
+        $func_double = static fn(float $f): float => $f * 2;
         $this->assertEquals(4, BasicMath::sum($arr, $func_return));
         $this->assertEquals(8, BasicMath::sum($arr, $func_double));
     }

tests/Numerics/MatrixTest.php

@@ -265,4 +265,5 @@ class MatrixTest extends TestCase
         Matrix::multiply($m1, $m2);
     }
 }
+
 // phpcs:enable