diff --git a/ArrayHelper.php b/ArrayHelper.php
index 69e5e8a..e680d43 100644
--- a/ArrayHelper.php
+++ b/ArrayHelper.php
@@ -4,6 +4,7 @@
  * createTime : 2018/5/4 18:37
  * description:
  */
+namespace yiier\helpers;
 
 use yii\helpers\ArrayHelper as BaseArrayHelper;
 
diff --git a/DateHelper.php b/DateHelper.php
index d77e7dc..55aa43a 100644
--- a/DateHelper.php
+++ b/DateHelper.php
@@ -5,9 +5,7 @@
  * description:
  */
 
-
-namespace common\helpers;
-
+namespace yiier\helpers;
 
 class DateHelper
 {
diff --git a/MailHelper.php b/MailHelper.php
index 6d4f14f..cd29197 100644
--- a/MailHelper.php
+++ b/MailHelper.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace common\helpers;
+namespace yiier\helpers;
 
 /**
  * Class MailHelper
diff --git a/ModelHelper.php b/ModelHelper.php
index 3558115..51811f7 100644
--- a/ModelHelper.php
+++ b/ModelHelper.php
@@ -5,7 +5,7 @@
  * description:
  */
 
-namespace common\helpers;
+namespace yiier\helpers;
 
 class ModelHelper
 {
diff --git a/README.md b/README.md
index 2caf831..c06d16a 100644
--- a/README.md
+++ b/README.md
@@ -45,4 +45,30 @@ if (!ModelHelper::saveAll(Post::tableName(), $rows)) {
 }
 ```
 
+**中国省份证验证**
+
+```php
+public function rules()
+{
+    return [
+        // ... 
+        ['id_card', '\yiier\helpers\validators\IdCardValidator'],
+        // code
+    ];
+}
+```
+
+**Array Validator**
+
+```php
+public function rules()
+{
+    return [
+        // ... 
+        ['product_ids', '\yiier\helpers\validators\ArrayValidator'],
+        // code
+    ];
+}
+```
+
 ……
\ No newline at end of file
diff --git a/Security.php b/Security.php
index 9902f74..039cb93 100644
--- a/Security.php
+++ b/Security.php
@@ -1,11 +1,11 @@
 <?php
-
 /**
  * author     : forecho <caizhenghai@gmail.com>
  * createTime : 2015/12/29 18:37
  * description:
  */
-namespace common\helpers;
+
+namespace yiier\helpers;
 
 class Security
 {
diff --git a/Setup.php b/Setup.php
index 7666066..1b0f25b 100644
--- a/Setup.php
+++ b/Setup.php
@@ -5,8 +5,7 @@
  * description:
  */
 
-namespace common\helpers;
-
+namespace yiier\helpers;
 
 class Setup
 {
diff --git a/ArrayValidator.php b/validators/ArrayValidator.php
similarity index 92%
rename from ArrayValidator.php
rename to validators/ArrayValidator.php
index 2eeb248..c7f1f09 100644
--- a/ArrayValidator.php
+++ b/validators/ArrayValidator.php
@@ -5,7 +5,7 @@
  * description:
  */
 
-namespace common\helpers;
+namespace yiier\helpers\validators;
 
 use yii\validators\Validator;
 
diff --git a/validators/IdCardValidator.php b/validators/IdCardValidator.php
new file mode 100644
index 0000000..d141e61
--- /dev/null
+++ b/validators/IdCardValidator.php
@@ -0,0 +1,82 @@
+<?php
+/**
+ * author     : forecho <caizhenghai@gmail.com>
+ * createTime : 2018/05/08 16:21
+ * description:
+ */
+
+namespace yiier\helpers\validators;
+
+use yii\validators\Validator;
+
+class IdCardValidator extends Validator
+{
+    public function validateAttribute($model, $attribute)
+    {
+        if (!$this->validationFilterIdCard($model->$attribute)) {
+            $this->addError($model, $attribute, $this->message ?: '请输入正确的身份证号码');
+        }
+    }
+
+    private function validationFilterIdCard($idCard)
+    {
+        if (strlen($idCard) == 18) {
+            return $this->idCardChecksum18($idCard);
+        } elseif ((strlen($idCard) == 15)) {
+            $idCard = $this->idCard15to18($idCard);
+            return $this->idCardChecksum18($idCard);
+        } else {
+            return false;
+        }
+    }
+
+    // 计算身份证校验码，根据国家标准GB 11643-1999
+    private function idCardVerifyNumber($idCardBase)
+    {
+        if (strlen($idCardBase) != 17) {
+            return false;
+        }
+        //加权因子
+        $factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
+        //校验码对应值
+        $verifyNumberList = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
+        $checksum = 0;
+        for ($i = 0; $i < strlen($idCardBase); $i++) {
+            $checksum += substr($idCardBase, $i, 1) * $factor[$i];
+        }
+        $mod = $checksum % 11;
+        $verifyNumber = $verifyNumberList[$mod];
+        return $verifyNumber;
+    }
+
+    // 将15位身份证升级到18位
+    private function idCard15to18($idCard)
+    {
+        if (strlen($idCard) != 15) {
+            return false;
+        } else {
+            // 如果身份证顺序码是996 997 998 999，这些是为百岁以上老人的特殊编码
+            if (array_search(substr($idCard, 12, 3), ['996', '997', '998', '999']) !== false) {
+                $idCard = substr($idCard, 0, 6) . '18' . substr($idCard, 6, 9);
+            } else {
+                $idCard = substr($idCard, 0, 6) . '19' . substr($idCard, 6, 9);
+            }
+        }
+        $idCard = $idCard . $this->idCardVerifyNumber($idCard);
+        return $idCard;
+    }
+
+    // 18位身份证校验码有效性检查
+    private function idCardChecksum18($idCard)
+    {
+        if (strlen($idCard) != 18) {
+            return false;
+        }
+        $idCardBase = substr($idCard, 0, 17);
+        if ($this->idCardVerifyNumber($idCardBase) != strtoupper(substr($idCard, 17, 1))) {
+            return false;
+        } else {
+            return true;
+        }
+    }
+}
\ No newline at end of file