feat(php): 添加函数指针映射功能支持

- 新增 FUNC_MAP 常量用于存储函数映射
- 添加 funcIndex 和 funcMap 属性用于函数索引管理
- 实现 getFuncPtr 方法获取函数指针
- 修改函数调用逻辑使用新的函数指针机制
- 在扩展模板中添加函数映射数组声明
- 添加 php_get_func 外部函数声明和实现
- 更新翻译器生成相应的外部函数声明

src/Php/CompilerBase.php

@@ -54,6 +54,7 @@ class CompilerBase extends \PhpAot\Core\Translator
     public const string LITERAL_STRINGS = '_literal_strings';
 
     public const string CLASS_ENTRY_MAP = 'class_entry_map';
+    public const string FUNC_MAP = 'func_map';
 
     public const string EXPR_VARIABLE = 'Expr_Variable';
 
@@ -85,6 +86,8 @@ class CompilerBase extends \PhpAot\Core\Translator
      * @var array<string, int>
      */
     protected array $classMap = [];
+    protected int $funcIndex = 0;
+    protected array $funcMap = [];
 
     protected array $zendTypeMap = [
         'int'    => self::TYPE_INT,
@@ -668,6 +671,18 @@ class CompilerBase extends \PhpAot\Core\Translator
         return 'php_get_class_entry(' . $id . ', "' . $this->escapeString($className) . '")';
     }
 
+    protected function getFuncPtr(string $funcName): string
+    {
+        if (isset($this->funcMap[$funcName])) {
+            $id = $this->funcMap[$funcName];
+        } else {
+            $id                         = $this->funcIndex++;
+            $this->funcMap[$funcName] = $id;
+        }
+
+        return 'php_get_func(' . $id . ', "' . $this->escapeString($funcName) . '")';
+    }
+
     protected function parseFunctionDeclaration(Node\Stmt\Function_|Node\Stmt\ClassMethod $v): FunctionDef
     {
         // .stub 存根定义 C++ Native 函数，必须设置返回值类型
@@ -1777,15 +1792,11 @@ class CompilerBase extends \PhpAot\Core\Translator
             if ($nativeFn) {
                 return self::PREFIX . $nativeFn . '(' . $this->parseNativeCallArgs($expr->args, $nativeFn) . ')';
             }
-            if ($this->isInternalFunction($name)) {
-                $fn = 'php::' . $name;
-            } else {
-                $fn = '"' . $name . '"';
-            }
             $code = $this->parseFuncCallWithOptimizer($name, $expr);
             if ($code) {
                 return $code;
             }
+            $fn = $this->getFuncPtr($name);
         } else {
             $tmpVar = $this->genTmpVarName();
             $this->addLocalVar($tmpVar, self::TYPE_VAR);
@@ -1794,6 +1805,7 @@ class CompilerBase extends \PhpAot\Core\Translator
             $name                    = '';
         }
         $call = $silent ? 'php::silentCall' : 'php::call';
+
         if (empty($expr->args)) {
             return $call . '(' . $fn . ')';
         }

src/Php/Translator.php

@@ -210,6 +210,9 @@ class Translator extends Preprocessor
         $classEntryCount = count($this->classMap);
         $lines[]         = 'extern zend_class_entry *' . self::PREFIX . self::CLASS_ENTRY_MAP . '[' . $classEntryCount . '];' . PHP_EOL;
 
+        $funcCount = count($this->funcMap);
+        $lines[]         = 'extern zend_function *' . self::PREFIX . self::FUNC_MAP . '[' . $funcCount . '];' . PHP_EOL;
+
         $code = implode(PHP_EOL, $lines) . PHP_EOL . PHP_EOL;
         $this->writeFile($file, $code);
     }
@@ -301,6 +304,7 @@ class Translator extends Preprocessor
         }
 
         $code .= 'extern zend_class_entry *php_get_class_entry(int class_id, const char *class_name);' . PHP_EOL;
+        $code .= 'extern zend_function *php_get_func(int func_id, const char *func_name);' . PHP_EOL;
 
         $this->writeFile($file, $code);
     }

src/template/extension.cc.php

@@ -24,6 +24,9 @@ zend_class_entry * <?= $ce ?>;
 // class entry
 zend_class_entry *<?= Translator::PREFIX . Translator::CLASS_ENTRY_MAP . '[' . count($this->classMap) . ']' ?>;
 
+// func
+zend_function *<?= Translator::PREFIX . Translator::FUNC_MAP . '[' . count($this->funcMap) . ']' ?>;
+
 zend_class_entry *php_get_class_entry(int class_id, const char *class_name) {
     if (UNEXPECTED(<?= Translator::PREFIX . Translator::CLASS_ENTRY_MAP ?>[class_id] == nullptr)) {
         <?= Translator::PREFIX . Translator::CLASS_ENTRY_MAP ?>[class_id] = php::getClassEntrySafe(class_name);
@@ -31,6 +34,13 @@ zend_class_entry *php_get_class_entry(int class_id, const char *class_name) {
     return <?= Translator::PREFIX . Translator::CLASS_ENTRY_MAP ?>[class_id];
 }
 
+zend_function *php_get_func(int func_id, const char *func_name) {
+    if (UNEXPECTED(<?= Translator::PREFIX . Translator::FUNC_MAP ?>[func_id] == nullptr)) {
+        <?= Translator::PREFIX . Translator::FUNC_MAP ?>[func_id] = php::getFunction(func_name);
+    }
+    return <?= Translator::PREFIX . Translator::FUNC_MAP ?>[func_id];
+}
+
 // literal strings
 php::Var <?=Translator::LITERAL_STRINGS?>[] = {
 <?php