Stdlib: get_defined_functions(exclude_disabled:) on reference profile (#16902)

lib/CompilerVersion.php

@@ -619,11 +619,14 @@ public static function supportsGetDeclaredExcludeDeprecated(): bool
     }
 
     /**
-     * PHP 8.4+ get_defined_functions() optional $exclude_disabled (ext/standard/basic_functions.c, #4942).
+     * PHP 8.2+ get_defined_functions() optional $exclude_disabled (ext/standard/basic_functions.c, #4942).
+     *
+     * Unlike {@see supportsGetDeclaredExcludeDeprecated()} (PHP 8.4-only), Zend exposes this on the
+     * reference profile — BuiltinParamNames must register exclude_disabled without forward gating.
      */
     public static function supportsGetDefinedFunctionsExcludeDisabled(): bool
     {
-        return self::supportsGetDeclaredExcludeDeprecated();
+        return version_compare(self::REFERENCE_PHP_VERSION, '8.2.0', '>=');
     }
 
     /**

test/repro/maintainer_gap_get_defined_functions_exclude_disabled_reference.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Maintainer repro: get_defined_functions(exclude_disabled: true) on reference profile (#16902).
+ *
+ * php-src: ext/standard/basic_functions.c — PHP_FUNCTION(get_defined_functions)
+ */
+
+$all = get_defined_functions();
+$filtered = get_defined_functions(exclude_disabled: true);
+
+if (count($all['internal']) < count($filtered['internal'])) {
+    echo "fail: filtered internal count exceeds unfiltered\n";
+    exit(1);
+}
+
+if (in_array('utf8_encode', $all['internal'], true)
+    && in_array('utf8_encode', $filtered['internal'], true)) {
+    echo "fail: utf8_encode not filtered\n";
+    exit(1);
+}
+
+echo "ok\n";

test/unit/CompilerVersionGateTest.php

@@ -740,9 +740,9 @@ public function testSupportsGetDeclaredExcludeDeprecatedTrueOnForwardProfile():
         }
     }
 
-    public function testSupportsGetDefinedFunctionsExcludeDisabledFalseOnReferenceProfile(): void
+    public function testSupportsGetDefinedFunctionsExcludeDisabledTrueOnReferenceProfile(): void
     {
-        $this->assertFalse(CompilerVersion::supportsGetDefinedFunctionsExcludeDisabled());
+        $this->assertTrue(CompilerVersion::supportsGetDefinedFunctionsExcludeDisabled());
     }
 
     public function testSupportsGetDefinedFunctionsExcludeDisabledTrueOnForwardProfile(): void