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<?php declare (strict_types=1); namespace Rector\DeadCode\Rector\Foreach_; use PhpParser\Node; use PhpParser\Node\Stmt\Foreach_; use Rector\Core\Rector\AbstractRector; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\DeadCode\Rector\Foreach_\RemoveUnusedForeachKeyRector\RemoveUnusedForeachKeyRectorTest */ final class RemoveUnusedForeachKeyRector extends AbstractRector { public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Remove unused key in foreach', [new CodeSample(<<<'CODE_SAMPLE' $items = []; foreach ($items as $key => $value) { $result = $value; } CODE_SAMPLE , <<<'CODE_SAMPLE' $items = []; foreach ($items as $value) { $result = $value; } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [Foreach_::class]; } /** * @param Foreach_ $node */ public function refactor(Node $node) : ?Node { if ($node->keyVar === null) { return null; } $keyVar = $node->keyVar; $isNodeUsed = (bool) $this->betterNodeFinder->findFirst($node->stmts, function (Node $node) use($keyVar) : bool { return $this->nodeComparator->areNodesEqual($node, $keyVar); }); if ($isNodeUsed) { return null; } $node->keyVar = null; return $node; } }
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