conditionEvaluator = $conditionEvaluator; $this->conditionResolver = $conditionResolver; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Remove php version checks if they are passed', [new CodeSample(<<<'CODE_SAMPLE' // current PHP: 7.2 if (version_compare(PHP_VERSION, '7.2', '<')) { return 'is PHP 7.1-'; } else { return 'is PHP 7.2+'; } CODE_SAMPLE , <<<'CODE_SAMPLE' // current PHP: 7.2 return 'is PHP 7.2+'; CODE_SAMPLE )]); } /** * @return array> */ public function getNodeTypes() : array { return [If_::class]; } /** * @param If_ $node * @return Stmt[]|null|int */ public function refactor(Node $node) { if ($node->elseifs !== []) { return null; } $condition = $this->conditionResolver->resolveFromExpr($node->cond); if (!$condition instanceof ConditionInterface) { return null; } $result = $this->conditionEvaluator->evaluate($condition); if ($result === null) { return null; } // if is skipped if ($result === \true) { return $this->refactorIsMatch($node); } if ($result > 0) { return $this->refactorIsMatch($node); } return $this->refactorIsNotMatch($node); } /** * @return Stmt[]|null */ private function refactorIsMatch(If_ $if) : ?array { if ($if->elseifs !== []) { return null; } return $if->stmts; } /** * @return Stmt[]|int */ private function refactorIsNotMatch(If_ $if) { // no else → just remove the node if (!$if->else instanceof Else_) { return NodeTraverser::REMOVE_NODE; } // else is always used return $if->else->stmts; } }