diff --git a/examples/prime.go b/examples/prime.go
new file mode 100644
index 00000000..0f3d027e
--- /dev/null
+++ b/examples/prime.go
@@ -0,0 +1,40 @@
+package main
+
+import (
+	"strconv"
+	"time"
+)
+
+func NthPrime(n int) int {
+
+	var (
+		i int = 2
+		j int = 1
+	)
+
+	for {
+		j = j + 1;
+		if j > i/j {
+			n--
+			if n == 0 {
+				break
+			}
+			j = 1
+		}
+		if i%j == 0 {
+			i++;
+			j = 1;
+		}
+	}
+	return i
+}
+
+func main() {
+	s := time.Now().UnixNano() / 1e6
+	n := 300000
+	result := NthPrime(n)
+	e := time.Now().UnixNano() / 1e6
+	time := e - s
+	println("第" + strconv.Itoa(n) + "个素数的值是:" + strconv.Itoa(result) + " 耗时" + strconv.Itoa(int(time)) + "毫秒")
+}
+//第300000个素数的值是:4256233 耗时10417毫秒
\ No newline at end of file
diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index 3212a6bb..bf2a88f1 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -709,7 +709,11 @@ class CompilerBase extends \PhpAot\Core\Translator
             if (isset($this->arguments[$name])) {
                 continue;
             }
-            $code .= $this->getIndent() . $type . ' ' . $name . ';' . PHP_EOL;
+            $code .= $this->getIndent() . $type . ' ' . $name;
+            if ($type === self::TYPE_INT or $type === self::TYPE_FLOAT or $type === self::TYPE_BOOL) {
+                $code .= ' = 0';
+            }
+            $code .= ';' . PHP_EOL;
         }
         $code .= "\n";
         $this->indentLevel--;
@@ -1715,9 +1719,11 @@ class CompilerBase extends \PhpAot\Core\Translator
                 return $var . '.newItem()';
             }
         } else {
-            $dim = $this->trimBrackets($this->parseIdentifier($node->dim));
-
-            return $var . '.item(' . $dim . ', ' . $this->escapeBool($write) . ')';
+            $oriInAssignExpr = $this->inAssignExpr;
+            $this->inAssignExpr = false;
+            $dim = $this->parseIdentifier($node->dim);
+            $this->inAssignExpr = $oriInAssignExpr;
+            return $var . '.item(' . $this->trimBrackets($dim) . ', ' . $this->escapeBool($write) . ')';
         }
     }
 
diff --git a/tests/misc/2.phpt b/tests/misc/2.phpt
new file mode 100644
index 00000000..859b20d2
--- /dev/null
+++ b/tests/misc/2.phpt
@@ -0,0 +1,75 @@
+--TEST--
+mixed/2.phpt
+--FILE--
+<?php
+
+class Node
+{
+    public $is_end = false;
+    public $child = [];
+}
+
+class Trie
+{
+    private $root = null;
+
+    function __construct()
+    {
+        $this->root = new Node();
+    }
+
+    function insert($word)
+    {
+        $node = $this->root;
+
+        for ($i = 0; $i < strlen($word); $i++) {
+            if (!isset($node->child[$word[$i]])) {
+                $node->child[$word[$i]] = new Node();
+            }
+
+            $node = $node->child[$word[$i]];
+            if ($i == strlen($word) - 1) {
+                $node->is_end = true;
+            }
+        }
+    }
+
+    function search($word)
+    {
+        $node = $this->root;
+        for ($i = 0; $i < strlen($word); $i++) {
+            if (isset($node->child[$word[$i]])) {
+                $node = $node->child[$word[$i]];
+            } else {
+                return false;
+            }
+        }
+
+        return $node->is_end;
+    }
+
+    function startsWith($prefix)
+    {
+        $node = $this->root;
+        for ($i = 0; $i < strlen($prefix); $i++) {
+            if (isset($node->child[$prefix[$i]])) {
+                $node = $node->child[$prefix[$i]];
+            } else {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
+function main()
+{
+    $Trie = new Trie();
+    $Trie->insert('apple');
+    var_dump($Trie->search("apple"));
+    var_dump($Trie->startsWith("apps"));
+}
+?>
+--EXPECT--
+bool(true)
+bool(false)