fix(php): 修复预处理器中的依赖关系处理逻辑

- 在符号依赖检查中添加文件过滤条件，避免将当前文件添加到依赖列表中
- 移除对函数节点类型的冗余检查，简化符号声明文件映射逻辑
- 确保所有符号声明都能正确记录到对应文件中，提高依赖解析准确性

src/Php/Preprocessor.php

@@ -26,11 +26,15 @@ class Preprocessor extends CompilerBase
             $deps = [];
             foreach ($symbols as $symbol) {
                 if (isset($this->symbolDeclInFile[$symbol])) {
-                    $deps[] = $this->symbolDeclInFile[$symbol];
+                    $depFile = $this->symbolDeclInFile[$symbol];
+                    if ($depFile !== $file) {
+                        $deps[] = $depFile;
+                    }
                 }
             }
             $sorter->add($file, array_unique($deps));
         }
+
         $sortedFiles = $sorter->sort();
 
         foreach ($list as $file) {
@@ -171,9 +175,7 @@ class Preprocessor extends CompilerBase
         if ($this->stubFile) {
             $this->nativeFunctions[$name] = $this->parseFunctionDecl($v);
         } else {
-            if ($v instanceof Node\Stmt\Function_) {
-                $this->symbolDeclInFile[strtolower($name)] = $this->file;
-            }
+            $this->symbolDeclInFile[strtolower($name)] = $this->file;
         }
     }