diff --git a/examples/array_get.php b/examples/array_get.php
new file mode 100644
index 00000000..9b8497a2
--- /dev/null
+++ b/examples/array_get.php
@@ -0,0 +1,15 @@
+<?php
+//$array = [1, 3, 4, 5, 6];
+//
+//var_dump($array[2.3]);
+//
+//var_dump($array['3.2']);
+//
+//$str = "hello world\n";
+//var_dump($str[99]);
+//var_dump($str[-3]);
+
+
+$o = new ArrayObject();
+$o['hello'] = 'world';
+var_dump($o['hello'], $o);
diff --git a/examples/c/fib.c b/examples/c/fib.c
new file mode 100644
index 00000000..ec3daefa
--- /dev/null
+++ b/examples/c/fib.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int fib(int n) {
+    if (n == 1 || n == 2) {
+        return 1;
+    } else {
+        return fib(n - 1) + fib(n - 2);
+    }
+}
+
+int main(int argc, char **argv) {
+    long long n = atoi(argv[1]);
+    printf("斐波那契数列的第%d项是：%d\n", n, fib(n));
+    return 0;
+}
diff --git a/examples/fib.php b/examples/fib.php
new file mode 100644
index 00000000..afee1582
--- /dev/null
+++ b/examples/fib.php
@@ -0,0 +1,19 @@
+<?php
+
+function main()
+{
+    global $argv;
+    $n = $argv[2];
+    $begin = microtime(true);
+    echo fib($n) . "\n";
+    echo "Time: " . (microtime(true) - $begin) . "\n";
+}
+
+function fib(int $n): int
+{
+    if ($n == 1 || $n == 2) {
+        return 1;
+    } else {
+        return fib($n - 1) + fib($n - 2);
+    }
+}
diff --git a/main.php b/main.php
index 96253c08..06f72fb6 100644
--- a/main.php
+++ b/main.php
@@ -1,3 +1,3 @@
 <?php
-include __DIR__ . '/examples/pi.php';
+include __DIR__ . '/examples/' . $argv[1];
 main();
\ No newline at end of file
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index 8c618b38..3987b1a1 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -35,6 +35,7 @@ class Translator extends \PhpAot\Core\Translator
     protected string $namespace = '';
     protected array $uses = [];
     protected string $class = '';
+    protected string $returnType = '';
 
     const PREFIX = 'php_';
 
@@ -129,18 +130,18 @@ class Translator extends \PhpAot\Core\Translator
         $name = implode('__', array_reverse($names));
 
         if ($v->returnType) {
-            $returnType = $this->getZendType($this->parseIdentifier($v->returnType));
+            $this->returnType = $this->getZendType($this->parseIdentifier($v->returnType));
         } else {
-            $returnType = 'void';
+            $this->returnType = 'void';
         }
 
         $params = $this->parseParams($v->params);
-        $code = $returnType . ' ' . self::PREFIX . $name . '(' . $params . ') {' . PHP_EOL;
+        $code = $this->returnType . ' ' . self::PREFIX . $name . '(' . $params . ') {' . PHP_EOL;
         $this->indentLevel++;
         $stmts = $this->parseStmts($v->stmts);
         $this->indentLevel--;
         $code .= $stmts;
-        $code .= "}";
+        $code .= "}\n";
 
         return $code;
     }
@@ -215,6 +216,9 @@ class Translator extends \PhpAot\Core\Translator
                 case 'Stmt_Continue':
                     $lines[] = 'continue;';
                     break;
+                case 'Stmt_Global':
+                    $lines[] = $this->parseGlobal($v);
+                    break;
                 default:
                     debug($v);
             }
@@ -367,7 +371,14 @@ class Translator extends \PhpAot\Core\Translator
 
     private function parseReturn(mixed $v): string
     {
-        return 'return ' . $this->parseExpr($v->expr);
+        $type = $this->detectType($v->expr);
+        $expr = $this->parseExpr($v->expr);
+        if ($this->returnType == self::TYPE_INT and $type == self::TYPE_VAR) {
+            return 'return (' . $expr . ').toInt()';
+        } elseif ($this->returnType == self::TYPE_FLOAT and $type == self::TYPE_VAR) {
+            return 'return (' . $expr . ').toFloat()';
+        }
+        return 'return ' . $expr;
     }
 
     private function parseBinaryOpMul(mixed $expr): string
@@ -378,7 +389,7 @@ class Translator extends \PhpAot\Core\Translator
         return '(' . $left . ') * (' . $right . ')';
     }
 
-    private function detectType($var, $expr): string
+    private function detectType($expr): string
     {
         $exprType = $expr->getType();
         switch ($exprType) {
@@ -393,8 +404,8 @@ class Translator extends \PhpAot\Core\Translator
             case 'Expr_Array':
                 return 'php::Array';
             case 'Expr_BinaryOp_Plus':
-                $leftType = $this->detectType($var, $expr->left);
-                $rightType = $this->detectType($var, $expr->right);
+                $leftType = $this->detectType($expr->left);
+                $rightType = $this->detectType($expr->right);
                 if ($leftType === self::TYPE_INT || $rightType === self::TYPE_INT) {
                     return self::TYPE_INT;
                 } else {
@@ -563,7 +574,7 @@ class Translator extends \PhpAot\Core\Translator
     {
         $var = $this->parseIdentifier($node->var);
         $dim = $this->parseIdentifier($node->dim);
-        return $var . '[' . $dim . ']';
+        return $var . '.offsetGet(' . $dim . ')';
     }
 
     private function parseBinaryOpShiftLeft($node): string
@@ -974,4 +985,13 @@ class Translator extends \PhpAot\Core\Translator
     {
         return '"' . $this->escapeString($expr->value) . '"';
     }
+
+    private function parseGlobal(Node $v): string
+    {
+        $out = [];
+        foreach ($v->vars as $v) {
+            $out [] = self::TYPE_VAR . ' ' . $v->name . ' = php::global("' . $v->name . '");';
+        }
+        return implode(PHP_EOL . $this->getIndent(), $out);
+    }
 }