Port _checkType implementation from v2

Author: bzikarsky

src/functions.php

@@ -342,33 +342,49 @@ function _checkTypehint(callable $callback, \Throwable $reason): bool
         return true;
     }
 
-    $type = $parameters[0]->getType();
+    $expectedException = $parameters[0];
 
-    if (!$type) {
-        return true;
-    }
+    // PHP before v8 used an easy API:
+    if (\PHP_VERSION_ID < 70100 || \defined('HHVM_VERSION')) {
+        if (!$expectedException->getClass()) {
+            return true;
+        }
 
-    $types = [$type];
+        return $expectedException->getClass()->isInstance($reason);
+    }
 
-    if ($type instanceof \ReflectionUnionType) {
-        $types = $type->getTypes();
+    // Extract the type of the argument and handle different possibilities
+    $type = $expectedException->getType();
+    $types = [];
+
+    switch (true) {
+        case $type === null:
+            break;
+        case $type instanceof \ReflectionNamedType:
+            $types = [$type];
+            break;
+        case $type instanceof \ReflectionUnionType;
+            $types = $type->getTypes();
+            break;
+        default:
+            throw new \LogicException('Unexpected return value of ReflectionParameter::getType');
     }
 
-    $mismatched = false;
+    // If there is no type restriction, it matches
+    if (empty($types)) {
+        return true;
+    }
 
+    // Search for one matching named-type for success, otherwise return false
+    // A named-type can be either a class-name or a built-in type like string, int, array, etc.
     foreach ($types as $type) {
-        if (!$type || $type->isBuiltin()) {
-            continue;
-        }
+        $matches = ($type->isBuiltin() && \gettype($reason) === $type->getName())
+            || (new \ReflectionClass($type->getName()))->isInstance($reason);
 
-        $expectedClass = $type->getName();
-
-        if ($reason instanceof $expectedClass) {
+        if ($matches) {
             return true;
         }
-
-        $mismatched = true;
     }
 
-    return !$mismatched;
+    return false;
 }