refactor(php): 重构PHP编译器中的静态属性赋值解析逻辑

- 将静态属性赋值解析提取为独立的parseAssignStaticProperty方法
- 修改parseAssign方法以使用新的辅助方法进行静态属性检查
- 添加函数定义存在性验证以避免未定义函数的致命错误
- 使用独立的函数名存在性检查替代直接数组访问
- 改进了代码结构和可读性

src/Php/CompilerBase.php

@@ -992,18 +992,8 @@ class CompilerBase extends \PhpAot\Core\Translator
         return implode(";\n" . $this->getIndent(), $list);
     }
 
-    protected function parseAssign(Node\Expr\Assign $v): string
+    protected function parseAssignStaticProperty($left, $right)
     {
-        $left  = $v->var;
-        $right = $v->expr;
-
-        if ($right->getType() === 'Expr_Assign') {
-            return $this->parseRightAssociativeAssign($left, $right);
-        }
-        if ($left->getType() === self::EXPR_ARRAY_DIM_FETCH) {
-            return $this->parseAssignArrayDim($left, $right);
-        }
-        if ($left->getType() === 'Expr_StaticPropertyFetch') {
         $value    = $this->trimBrackets($this->parseExpr($right));
         $native = $this->parseNativeStaticPropertyFetch($left);
         if ($native) {
@@ -1014,6 +1004,20 @@ class CompilerBase extends \PhpAot\Core\Translator
         return "php::setStaticProperty({$class}, {$propName}, {$value})";
     }
 
+    protected function parseAssign(Node\Expr\Assign $v): string
+    {
+        $left  = $v->var;
+        $right = $v->expr;
+
+        if ($right->getType() === 'Expr_Assign') {
+            return $this->parseRightAssociativeAssign($left, $right);
+        }
+        if ($this->isArrayDimFetch($left)) {
+            return $this->parseAssignArrayDim($left, $right);
+        }
+        if ($this->isStaticPropertyFetch($left)) {
+            return $this->parseAssignStaticProperty($left, $right);
+        }
         return $this->parseFinallyAssign($left, $right);
     }
 
@@ -2315,6 +2319,9 @@ class CompilerBase extends \PhpAot\Core\Translator
 
     protected function getArgInfo(Node $arg, string $funcName, int $index): ArgInfo
     {
+        if (!isset($this->nativeFunctions[$funcName])) {
+            $this->fatalError($arg, "Function `{$funcName}` is undefined, you must adjust the order of function definition");
+        }
         $funcDef = $this->nativeFunctions[$funcName];
         if (!array_key_exists($index, $funcDef->argInfoList)) {
             $this->fatalError($arg, "Argument `{$index}` of function `{$funcName}` not found");