!DOCTYPE html>
html>
head>
  title>業務A的驗證碼頁面/title>
/head>
body>
  img src="" alt="驗證碼" id="imgValCode">
/body>
/html>
 script src="jquery.js">/script>
  script type="text/javascript">
  $.ajax({
    url: '/Captcha/A/refresh', //不同業務模塊調用不同的url B業務調用/Captcha/B/refresh
    type: 'get',
    dataType: 'json',
    async: true,
    success:function(data) {
      if ( data.src ) {
        $('#imgValCode').attr('src',data.src);
      }
    }
  });
/script>

?php
/**
 * yii1.0 驗證碼類
 * 多個驗證碼，方式業務A頁面和業務B頁面同時打開，共用一個驗證碼session，導致其中一個被失效的問題
 */
class CaptchaController extends CHttpModuleController 
{
  /**
   * 驗證碼生成函數
   */
  public function actions() 
  {
    return [
      //A業務驗證碼
      'A' => [
        'class' => 'application.components.MyCaptcha.MyCaptchaAction',
        'backColor' => 0xFFFFFF,
        'minLength' => 5,
        'maxLength' => 5,
        'offset' => 5,
        'testLimit' => 1,
        'width' => 100,
        'height' => 40,
        'isInterferingLine' => true, //是否啟用干擾線
        'interferingLineNumber' => 8, //干擾線數量設置
        'foreColor' => '0x0c0c0e'
      ],
      //B業務驗證碼
      'B' => [
        'class' => 'application.components.MyCaptcha.MyCaptchaAction',
        'backColor' => 0xFFFFFF,
        'minLength' => 5,
        'maxLength' => 5,
        'offset' => 5,
        'testLimit' => 1,
        'width' => 100,
        'height' => 40,
        'isInterferingLine' => false, //是否啟用干擾線
        'interferingLineNumber' => 8, //干擾線數量設置
        'foreColor' => '0x0c0c0e'
      ]
    ];
  }

  /**
   * 驗證碼驗證函數
   * 在需要驗證驗證碼的控制器中調用，傳遞businessId(業務類型id)作為區分不同驗證碼的id
   * 調用方式：
   * Yii::app()->runController('Captcha/actionVerifyCode',[ 'businessId' => 'A' ]);
   */
  public function actionVerifyCode($businessId) 
  {
    $code = Yii::app()->request->getPost('code');        //接收用戶輸入的驗證碼
    if ( $businessId == 'A' ) {
      $vcode = $this->createAction('A')->getVerifyCode();   //獲取A業務的驗證碼
    } else if ( $businessId == 'B' ) {
      $vcode = $this->createAction('B')->getVerifyCode();   //獲取B業務的驗證碼
    }
    if ( empty($vcode) || empty($code) || $vcode != $code ) {  //驗證用戶輸入驗證碼與驗證碼是否相等
      return false;    //驗證不通過
    }
    return true;  //驗證通過
  }
}
?>