提共一個透明的數字驗證碼

[kemper (Kemper Cheung)]

前幾周開始挑選合適的 framwork

在 CodeIgniter & Yii 兩者之前挑來挑去的

最後 就賭上 Yii 了， 不多 Yii  的中文 文件真少 好像也推出不久

不如 CodeIgniter 的 中文文件多 ， 推出也久

但既來之 則 安知 慢慢摸索了

本週終於有時間可以研究了

有用到一組 透明背景的數字驗證碼

提供出來給大家

至少我自己也要有所貢獻

<?php

class CKCaptchaAction extends CCaptchaAction {

public $imageTransparent=false;	//背景是否透明

    protected function generateVerifyCode() {

	if($this->minLength < 3)	$this->minLength=3;


	if($this->maxLength > 10)	 $this->maxLength=10;


	if($this->minLength > $this->maxLength)	$this->maxLength=  $this->minLength;


	$length = rand($this->minLength, $this->maxLength);





	$code='';


	for($i=0; $i<$length; $i++) {


		$code .= Chr(48+rand(0, 9));


	}





	return $code;

  }

protected function renderImage($code) {


		$image = ImageCreate($this->width, $this->height);


		$backColor = ($this->imageTransparent) ? ImageColorTransparent($image, ImageColorAllocate($image, (int)($this->backColor%0x1000000/0x10000), (int)($this->backColor%0x10000/0x100), $this->backColor%0x100)) : ImageColorAllocate($image, (int)($this->backColor%0x1000000/0x10000), (int)($this->backColor%0x10000/0x100), $this->backColor%0x100);//ImageColorAllocate第1次定義顏色PHP就認為是底色了


		//$backColor = ImageColorTransparent($image, ImageColorAllocate($image, (int)($this->backColor%0x1000000/0x10000), (int)($this->backColor%0x10000/0x100), $this->backColor%0x100));


		//文字顏色為藍色


		$foreColor = ImageColorAllocate($image, (int)($this->foreColor%0x1000000/0x10000), (int)($this->foreColor%0x10000/0x100), $this->foreColor%0x100);


		//圖片背景為白色


		/*


		for($i=1; $i<=200; $i++) {    //先用100個做測試  


			imageString($im, 1, mt_rand(0, $img_width), mt_rand(0, $img_height), "*", imageColorAllocate($im,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255)));  


		}


		*/


		// 將文字放到圖片裡面並靠左上角


		ImageString($image, 5, 4, 0, $code, $foreColor);


		//輸出圖片


		header("Content-type: image/png");


		ImagePNG($image);


}

}

客位可以把它存到 \extensions\CKCaptchaAction.php

再去呼叫他就好，這裡好像沒在討論 CodeIgniter ＆ Yii的喔

不過也好  東西 各有好壞 在用的人的不同嘛！！

[gdtv]

有演示吗？

[qiang (Qiang Xue)]

很不错啊。把它放到extensions里共享？

[kemper (Kemper Cheung)]

class SiteController extends CController

{

public function actionIndex() {


	Yii::app()->session->open();


	$this->layout = 'login';


	$form=new LoginForm;


	if(isset($_POST['LoginForm'])) {


		// 收集用戶輸入的數據


		$form->attributes=$_POST['LoginForm'];


		// 驗證用戶輸入，如果無效則重定位到前個頁面


		if($form->validate())


			$this->redirect(Yii::app()->user->returnUrl);


	}


	// 顯示登陸表單


	$this->render('login',array('form'=>$form));


	//$this->render('login', array('user'=>$form));


}





public function actions() {


	return array(


		'captcha'=> array(				


			'class' => 'application.extensions.CKCaptchaAction',	//'CCaptchaAction',


			'backColor' => 0xc0c0c0,


			'foreColor' => 0x0000ff,


			'height' => 16,


			'width' => 42,


			'testLimit' => 2,


			'maxLength' => 4,


			'minLength' => 4,	


		 ),


	);


}

}

[kemper (Kemper Cheung)]

<?php

/**

• LoginForm class.

• LoginForm is the data structure for keeping

• user login form data. It is used by the 'login' action of 'SiteController'.

*/

class LoginForm extends CFormModel

{

public $username;


public $password;


public $verifyCode;


public $rememberMe;





/**


 * Declares the validation rules.


 * The rules state that username and password are required,


 * and password needs to be authenticated.


 */


public function rules()


{


	return array(


		// username and password are required


		array('username, password, verifyCode', 'required'),


		// password needs to be authenticated


		array('password', 'authenticate'),


		array('verifyCode', 'captcha', 'allowEmpty'=> !extension_loaded('gd')),


	);


}





/**


 * Declares the attribute labels.


 * If an attribute is not delcared here, it will use the default label


 * generation algorithm to get its label.


 */


public function attributeLabels()


{


	return array(


		'rememberMe'=>'Remember me next time',


	);


}





/**


 * Authenticates the password.


 * This is the 'authenticate' validator as declared in rules().


 */


public function authenticate($attribute,$params)


{


	if(!$this->hasErrors())  // we only want to authenticate when no input errors


	{


		$identity=new UserIdentity($this->username, $this->password);


		$identity->authenticate();


		switch($identity->errorCode)


		{


			case UserIdentity::ERROR_NONE:


				$duration=$this->rememberMe ? 3600*24*30 : 0; // 30 days


				Yii::app()->user->login($identity,$duration);


				Yii::app()->user->returnUrl = Yii::app()->urlManager->createUrl('admin');


				break;


			case UserIdentity::ERROR_USERNAME_INVALID:


				$this->addError('username','Username is incorrect.');


				break;


			default: // UserIdentity::ERROR_PASSWORD_INVALID


				$this->addError('password','Password is incorrect.');


				break;


		}


	}


}

}