nodeComparator = $nodeComparator; $this->betterNodeFinder = $betterNodeFinder; } /** * @param Stmt[] $stmts * @return KeyAndExpr[] */ public function resolveFromStmtsAndVariable(array $stmts, Variable $variable) : array { $keysAndExprs = []; foreach ($stmts as $stmt) { if (!$stmt instanceof Expression) { return []; } $stmtExpr = $stmt->expr; if (!$stmtExpr instanceof Assign) { return []; } $assign = $stmtExpr; $keyExpr = $this->matchKeyOnArrayDimFetchOfVariable($assign, $variable); if ($assign->var instanceof ArrayDimFetch && $assign->var->var instanceof ArrayDimFetch) { return []; } $keysAndExprs[] = new KeyAndExpr($keyExpr, $assign->expr, $stmt->getComments()); } // we can only work with same variable // and exclusively various keys or empty keys if (!$this->hasExclusivelyNullKeyOrFilledKey($keysAndExprs)) { return []; } return $keysAndExprs; } private function matchKeyOnArrayDimFetchOfVariable(Assign $assign, Variable $variable) : ?Expr { if (!$assign->var instanceof ArrayDimFetch) { return null; } $arrayDimFetch = $assign->var; if (!$this->nodeComparator->areNodesEqual($arrayDimFetch->var, $variable)) { return null; } $isFoundInExpr = (bool) $this->betterNodeFinder->findFirst($assign->expr, function (Node $subNode) use($variable) : bool { return $this->nodeComparator->areNodesEqual($subNode, $variable); }); if ($isFoundInExpr) { return null; } return $arrayDimFetch->dim; } /** * @param KeyAndExpr[] $keysAndExprs */ private function hasExclusivelyNullKeyOrFilledKey(array $keysAndExprs) : bool { $alwaysNullKey = \true; $alwaysStringKey = \true; foreach ($keysAndExprs as $keyAndExpr) { if ($keyAndExpr->getKeyExpr() instanceof Expr) { $alwaysNullKey = \false; } else { $alwaysStringKey = \false; } } if ($alwaysNullKey) { return \true; } return $alwaysStringKey; } }