support @phpstandba-inference-placeholder on calls via variable (#434)

Author: staabm

src/QueryReflection/QueryReflection.php

@@ -188,8 +188,19 @@ private function resolveQueryExpr(Expr $queryExpr, Scope $scope): ?string
     /**
      * @throws UnresolvableQueryException
      */
-    private function resolveQueryStringExpr(Expr $queryExpr, Scope $scope): ?string
+    private function resolveQueryStringExpr(Expr $queryExpr, Scope $scope, bool $resolveVariables = true): ?string
     {
+        if (true === $resolveVariables && $queryExpr instanceof Expr\Variable) {
+            $finder = new ExpressionFinder();
+            $assignExpr = $finder->findQueryStringExpression($queryExpr);
+
+            if (null !== $assignExpr) {
+                return $this->resolveQueryStringExpr($assignExpr, $scope);
+            }
+
+            return $this->resolveQueryStringExpr($queryExpr, $scope, false);
+        }
+
         if ($queryExpr instanceof Expr\CallLike) {
             $methodReflection = null;
             if ($queryExpr instanceof Expr\StaticCall) {

tests/default/data/inference-placeholder.php

@@ -18,6 +18,14 @@ public function fetchOneWithDynamicQueryPart(Connection $conn, string $email)
         assertType('string|false', $fetchResult);
     }
 
+    public function fetchOneWithDynamicQueryPartViaVariable(Connection $conn, string $email)
+    {
+        $dynamicPart = self::dynamicWhere(rand(0, 100));
+        $query = 'SELECT email, adaid FROM ada WHERE email = :email AND '.$dynamicPart;
+        $fetchResult = $conn->fetchOne($query, ['email' => $email]);
+        assertType('string|false', $fetchResult);
+    }
+
     /**
      * simulating a dynamic where part, not relevant for the query overall result.
      *