diff --git a/graphify/extract.py b/graphify/extract.py
index 59d4f8283..e21e21705 100644
--- a/graphify/extract.py
+++ b/graphify/extract.py
@@ -796,7 +796,14 @@ def _get_c_func_name(node, source: bytes) -> str | None:
 _PHP_CONFIG = LanguageConfig(
     ts_module="tree_sitter_php",
     ts_language_fn="language_php",
-    class_types=frozenset({"class_declaration"}),
+    # interfaces/enums/traits are class-like containers whose heritage
+    # (extends/implements) and members must be captured, same as classes.
+    class_types=frozenset({
+        "class_declaration",
+        "interface_declaration",
+        "enum_declaration",
+        "trait_declaration",
+    }),
     function_types=frozenset({"function_definition", "method_declaration"}),
     import_types=frozenset({"namespace_use_clause"}),
     call_types=frozenset({"function_call_expression", "member_call_expression", "scoped_call_expression", "class_constant_access_expression"}),
@@ -808,7 +815,9 @@ def _get_c_func_name(node, source: bytes) -> str | None:
     call_accessor_node_types=frozenset({"member_call_expression"}),
     call_accessor_field="name",
     name_fallback_child_types=("name",),
-    body_fallback_child_types=("declaration_list", "compound_statement"),
+    # enums wrap their members in an enum_declaration_list rather than a
+    # declaration_list, so the body walk needs it to reach enum methods/cases.
+    body_fallback_child_types=("declaration_list", "compound_statement", "enum_declaration_list"),
     function_boundary_types=frozenset({"function_definition", "method_declaration"}),
     import_handler=_import_php,
 )
diff --git a/tests/test_languages.py b/tests/test_languages.py
index f610fbc40..52a2641e5 100644
--- a/tests/test_languages.py
+++ b/tests/test_languages.py
@@ -816,6 +816,37 @@ def test_php_splits_inherits_implements_mixes_in():
     assert ("DataProcessor", "HasName") in _edge_labels(r, "mixes_in")
 
 
+def test_php_interface_enum_trait_heritage(tmp_path):
+    """Interfaces, enums, and traits must be captured as class-like nodes so
+    their heritage edges are emitted. Previously only `class_declaration` was a
+    class type, so interface/enum/trait declarations produced no node and their
+    extends/implements/use edges were dropped entirely. Enum members live under
+    an `enum_declaration_list` (not a `declaration_list`), so the body walk must
+    reach them too.
+    """
+    src = (
+        "<?php\n"
+        "interface Identifiable {}\n"
+        "interface Nameable extends Identifiable {}\n"
+        "enum Suit: string implements Nameable {\n"
+        "    case Hearts = 'H';\n"
+        "    public function label(): string { return 'x'; }\n"
+        "}\n"
+        "trait Named {}\n"
+        "trait Greets { use Named; }\n"
+    )
+    f = tmp_path / "heritage.php"
+    f.write_text(src)
+    r = extract_php(f)
+    labels = _labels(r)
+    assert "Nameable" in labels and "Suit" in labels and "Greets" in labels
+    assert ("Nameable", "Identifiable") in _edge_labels(r, "inherits")
+    assert ("Suit", "Nameable") in _edge_labels(r, "implements")
+    assert ("Greets", "Named") in _edge_labels(r, "mixes_in")
+    # enum body (enum_declaration_list) must be walked to reach enum methods
+    assert ("Suit", "label") in _edge_labels(r, "method")
+
+
 def test_php_property_parameter_and_return_contexts():
     r = extract_php(FIXTURES / "sample.php")
     assert ("DataProcessor", "Result") in _edge_labels(r, "references", "field")