diff --git a/phpunit/code/function-method-symbol-collision.php b/phpunit/code/function-method-symbol-collision.php
index 03ff57f4..3b5c4d60 100644
--- a/phpunit/code/function-method-symbol-collision.php
+++ b/phpunit/code/function-method-symbol-collision.php
@@ -10,6 +10,11 @@ namespace Collision {
 }
 
 namespace Collision\Worker {
+    function validate(mixed $validater): mixed
+    {
+        return $validater;
+    }
+
     function invoke_validate(mixed $validater): mixed
     {
         return validate($validater);
diff --git a/phpunit/src/FunctionTest.php b/phpunit/src/FunctionTest.php
index 3228438c..cdb88016 100644
--- a/phpunit/src/FunctionTest.php
+++ b/phpunit/src/FunctionTest.php
@@ -13,8 +13,8 @@ class FunctionTest extends \BaseTest
         $cppFile = $compiler->convertFile($testFile);
         $cpp = file_get_contents($cppFile);
 
-        $this->assertStringContainsString('php::call(', $cpp);
-        $this->assertStringNotContainsString('php_collision__worker__validate(validater)', $cpp);
+        $this->assertStringContainsString('php_collision__worker__NSE__validate(validater)', $cpp);
+        $this->assertStringContainsString('php_collision__NSE__worker__validate(', $cpp);
     }
 
     public function testReturnRef(): void
diff --git a/src/CompilerBase.php b/src/CompilerBase.php
index 2663aadf..96a301a3 100644
--- a/src/CompilerBase.php
+++ b/src/CompilerBase.php
@@ -196,6 +196,7 @@ class CompilerBase implements PropertyAccessContext
     public const string FUNC_MAP = 'func_map';
     public const string PROP_MAP = 'property_map';
     public const string NAMESPACE_SEPARATOR = '__';
+    public const string NAMESPACE_END_MARKER = 'NSE';
 
     public const string PREFIX = 'php_';
     protected const string MULTI_RETURN_NAMESPACE = 'typephp::detail';
@@ -1018,7 +1019,14 @@ class CompilerBase implements PropertyAccessContext
 
     protected function getFunctionName(FunctionLike $v): string
     {
-        return $this->getNativeName($this->parseIdentifier($v->name), $this->namespace, $this->class);
+        if ($this->class !== '') {
+            return $this->getNativeClassMethodName(
+                $this->parseIdentifier($v->name),
+                $this->namespace,
+                $this->class,
+            );
+        }
+        return $this->getNativeFunctionName($this->parseIdentifier($v->name), $this->namespace);
     }
 
     protected function getFullClassName(): string
@@ -1141,6 +1149,29 @@ class CompilerBase implements PropertyAccessContext
         return implode(self::NAMESPACE_SEPARATOR, $names);
     }
 
+    protected function getNativeFunctionName(string $function, string $namespace = ''): string
+    {
+        $names = [];
+        if ($namespace !== '') {
+            $names[] = $this->escapeNamespace($namespace);
+            $names[] = self::NAMESPACE_END_MARKER;
+        }
+        $names[] = $this->escapeName($function);
+        return implode(self::NAMESPACE_SEPARATOR, $names);
+    }
+
+    protected function getNativeClassMethodName(string $method, string $namespace, string $class): string
+    {
+        $names = [];
+        if ($namespace !== '') {
+            $names[] = $this->escapeNamespace($namespace);
+        }
+        $names[] = self::NAMESPACE_END_MARKER;
+        $names[] = $this->escapeClass($class);
+        $names[] = $this->escapeName($method);
+        return implode(self::NAMESPACE_SEPARATOR, $names);
+    }
+
     protected function getClassId(string $className): int
     {
         if (isset($this->classMap[$className])) {
@@ -2362,7 +2393,7 @@ class CompilerBase implements PropertyAccessContext
         if ($checkArgs) {
             $this->checkNativeCallArgs($expr, $methodDef->functionDef, $expr->args, $classDef->getNamespacedName() . '::' . $method);
         }
-        return $this->getNativeName($method, $classDef->namespace, $classDef->name);
+        return $this->getNativeClassMethodName($method, $classDef->namespace, $classDef->name);
     }
 
     protected function findNativeClassConst(NodeAbstract $expr, string $class, string $const): string|false
@@ -2814,17 +2845,33 @@ class CompilerBase implements PropertyAccessContext
         // 绝对命名空间的函数
         if ($funcName[0] == '\\') {
             $funcName = ltrim($funcName, '\\');
-            $possibleFunctionNames = [$this->escapeName($funcName)];
+            $separator = strrpos($funcName, '\\');
+            if ($separator === false) {
+                $possibleFunctionNames = [$this->getNativeFunctionName($funcName)];
+            } else {
+                $possibleFunctionNames = [$this->getNativeFunctionName(
+                    substr($funcName, $separator + 1),
+                    substr($funcName, 0, $separator),
+                )];
+            }
         } else {
-            $possibleFunctionNames = [$this->escapeName($funcName)];
+            $possibleFunctionNames = [$this->getNativeFunctionName($funcName)];
             if (isset($this->useAliases[$funcName])) {
-                $possibleFunctionNames[] = $this->escapeName($this->escapeNamespace($this->useAliases[$funcName]));
+                $alias = $this->useAliases[$funcName];
+                $separator = strrpos($alias, '\\');
+                $possibleFunctionNames[] = $separator === false
+                    ? $this->getNativeFunctionName($alias)
+                    : $this->getNativeFunctionName(substr($alias, $separator + 1), substr($alias, 0, $separator));
             }
             if ($this->namespace) {
-                $possibleFunctionNames[] = $this->escapeNamespace($this->namespace) . self::NAMESPACE_SEPARATOR . $this->escapeName($funcName);
+                $possibleFunctionNames[] = $this->getNativeFunctionName($funcName, $this->namespace);
             }
             if (isset($this->useFunctions[$funcName])) {
-                $possibleFunctionNames[] = $this->escapeNamespace($this->useFunctions[$funcName]);
+                $alias = $this->useFunctions[$funcName];
+                $separator = strrpos($alias, '\\');
+                $possibleFunctionNames[] = $separator === false
+                    ? $this->getNativeFunctionName($alias)
+                    : $this->getNativeFunctionName(substr($alias, $separator + 1), substr($alias, 0, $separator));
             }
             // 复杂命名空间规则，组合命名空间
             // 例子：use foo\bar;  bar\fn();
@@ -2834,7 +2881,12 @@ class CompilerBase implements PropertyAccessContext
                 if ($ns1[array_key_last($ns1)] === $ns2[array_key_first($ns2)]) {
                     $ns = array_merge($ns1, $ns2);
                     array_splice($ns, array_key_last($ns1) + 1);
-                    $possibleFunctionNames[] = $this->escapeNamespace(implode('\\', $ns));
+                    $fullName = implode('\\', $ns);
+                    $separator = strrpos($fullName, '\\');
+                    $possibleFunctionNames[] = $this->getNativeFunctionName(
+                        substr($fullName, $separator + 1),
+                        substr($fullName, 0, $separator),
+                    );
                     break;
                 }
             }
diff --git a/src/Context/CompilationStateTrait.php b/src/Context/CompilationStateTrait.php
index f6156e80..b02614c7 100644
--- a/src/Context/CompilationStateTrait.php
+++ b/src/Context/CompilationStateTrait.php
@@ -106,7 +106,7 @@ trait CompilationStateTrait
 
     protected function addFunction(string $name, FunctionDef $functionDef): void
     {
-        $this->symbols->putFunction($this->escapeFunction($name), $functionDef);
+        $this->symbols->putFunction($this->escapeNativeFunctionKey($name), $functionDef);
     }
 
     /**
@@ -114,12 +114,32 @@ trait CompilationStateTrait
      */
     protected function hasFunction(string $name): bool
     {
-        return $this->symbols->hasFunction($this->escapeFunction($name));
+        return $this->symbols->hasFunction($this->escapeNativeFunctionKey($name));
     }
 
     protected function getFunction(string $name): FunctionDef
     {
-        return $this->symbols->function($this->escapeFunction($name));
+        return $this->symbols->function($this->escapeNativeFunctionKey($name));
+    }
+
+    /** Normalize PHP name segments without lowercasing the reserved ABI marker. */
+    private function escapeNativeFunctionKey(string $name): string
+    {
+        $placeholder = "\x00";
+        $leadingPlaceholder = "\x01";
+        $name = str_replace(
+            self::NAMESPACE_SEPARATOR . self::NAMESPACE_END_MARKER . self::NAMESPACE_SEPARATOR,
+            self::NAMESPACE_SEPARATOR . $placeholder . self::NAMESPACE_SEPARATOR,
+            $name,
+        );
+        if (str_starts_with($name, self::NAMESPACE_END_MARKER . self::NAMESPACE_SEPARATOR)) {
+            $name = $leadingPlaceholder . substr($name, strlen(self::NAMESPACE_END_MARKER));
+        }
+        return str_replace(
+            [$placeholder, $leadingPlaceholder],
+            [self::NAMESPACE_END_MARKER, self::NAMESPACE_END_MARKER],
+            $this->escapeFunction($name),
+        );
     }
 
     protected function addClass(string $name, ClassDef $classDef): void
diff --git a/src/Parser/UniversalMethodCall.php b/src/Parser/UniversalMethodCall.php
index 967c5886..11c7c3f2 100644
--- a/src/Parser/UniversalMethodCall.php
+++ b/src/Parser/UniversalMethodCall.php
@@ -392,7 +392,7 @@ trait UniversalMethodCall
                 }
                 $registry[$targetKey][$methodKey] = [
                     'handler' => 'provider_extension',
-                    'fn' => $this->getNativeName($method->name, $provider->namespace, $provider->name),
+                    'fn' => $this->getNativeClassMethodName($method->name, $provider->namespace, $provider->name),
                     'class' => $provider->getNamespacedName(false),
                     'return_type' => $function->returnType,
                     'min_args' => max(0, $function->argCountRequired - 1),
diff --git a/src/Translator.php b/src/Translator.php
index 861279a9..b1f1c81b 100644
--- a/src/Translator.php
+++ b/src/Translator.php
@@ -2471,7 +2471,7 @@ CODE;
 
     protected function getNativeMethodName(ClassDef $classDef, MethodDef $methodDef): string
     {
-        return $this->getNativeName($methodDef->name, $classDef->namespace, $classDef->name);
+        return $this->getNativeClassMethodName($methodDef->name, $classDef->namespace, $classDef->name);
     }
 
     protected function parseDeclare(mixed $v): void
@@ -4543,8 +4543,8 @@ CODE;
         $this->checkTraitMethodOverrideCompatibility($classDef, $methodDef, $classMethodName);
 
         $classDef->addMethod($methodDef);
-        $traitMethodNativeName = $this->getNativeName($traitMethodName, $traitDef->namespace, $traitDef->name);
-        $classMethodNativeName = $this->getNativeName($classMethodName, $classDef->namespace, $classDef->name);
+        $traitMethodNativeName = $this->getNativeClassMethodName($traitMethodName, $traitDef->namespace, $traitDef->name);
+        $classMethodNativeName = $this->getNativeClassMethodName($classMethodName, $classDef->namespace, $classDef->name);
         $argList = ['this_'];
         if ($methodDef->parentMethodCalls) {
             // Bind parent:: to the class that actually composes the trait. This
@@ -4780,7 +4780,7 @@ CODE;
     {
         $name = $this->escapeZendFnName($functionDef->getNamespacedName());
         $cppCode = 'ZEND_FUNCTION(' . $name . '){' . PHP_EOL;
-        $fn = self::PREFIX . $this->getNativeName($functionDef->name, $functionDef->namespace);
+        $fn = self::PREFIX . $this->getNativeFunctionName($functionDef->name, $functionDef->namespace);
         $cppCode .= $this->genWrapperFunctionArgs($fn, $functionDef, $functionDef->getNamespacedName());
 
         return $cppCode;
@@ -4792,9 +4792,9 @@ CODE;
         $fullName = ltrim($fullName, '\\');
         $separator = strrpos($fullName, '\\');
         if ($separator === false) {
-            return self::PREFIX . $this->getNativeName($fullName);
+            return self::PREFIX . $this->getNativeFunctionName($fullName);
         }
-        return self::PREFIX . $this->getNativeName(
+        return self::PREFIX . $this->getNativeFunctionName(
             substr($fullName, $separator + 1),
             substr($fullName, 0, $separator),
         );