php中使用验证码的方法大全

1）使用控制器来控制

views:

<tr>
<td width="100"><?php echo $form->textField($model, \'captcha\', array(\'class\' => \'input_s\', \'style\' => \'width:80px\')); ?></td>
<td width="110"><img id="captcha_img" src="<?php echo $this->createUrl(\'captcha/getPic\') . \'?\' . rand(0, 99); ?>" style="cursor: pointer" title="看不清楚,点击换一张验证码" alt="验证码" onclick="change_captcha();" /></td>
<td><a href="javascript:void(0);" style=" font-family:\'宋体\'; font-size:12px; color:#0065A9" onclick="change_captcha();">换一张</a></td>
</tr>

点击换一张的js：

function change_captcha(){
                $(\'#captcha_img\').attr(\'src\', "<?php echo $this->createUrl(\'captcha/getPic\'); ?>?"+Math.floor(Math.random()*200+1));
                $(\'#LoginForm_captcha\').val(\'\');
            }

　　

CaptchaController：

<?php

/**
 * 验证码
 */
class CaptchaController extends CController {
    
    public function actionGetPic(){
        Yii::import("application.helpers.captcha.Captcha"); 
        
        header("Content-type:image/png");
        $captcha5 = new Captcha();

        //@设置验证码宽度
        $captcha5->setWidth(99);
        //@设置验证码高度
        $captcha5->setHeight(30);
        //@设置字符个数
        $captcha5->setTextNumber(4);

        //@设置字符颜色
        //$captcha5->setFontColor(\'#ff9900\');
        //@设置字号大小
        //$captcha5->setFontSize(25);
        //@设置字体
        //$captcha5->setFontFamily(\'t1.ttf\');

        //@设置语言
        //$captcha5->setTextLang(\'cn\');

        //@设置背景颜色
        //$captcha5->setBgColor(\'#000000\');
        //@设置干扰点数量
        $captcha5->setNoisePoint(100);
        //@设置干扰线数量
        //$captcha5->setNoiseLine(10);
        //@设置是否扭曲
        $captcha5->setDistortion(true);
        //@设置是否显示边框
        $captcha5->setShowBorder(false);

        //输出验证码
        $code = $captcha5->createImage();
        
        Yii::app()->session[\'captchaCode\'] = array(
            \'content\' => $code,   //验证码的内容
            \'time\' => time()      //验证码的使用时间
        );
        exit;
    }
}
//注意这里要引入包

将验证码作为一个登陆模型的属性:

<?php

class LoginForm extends CFormModel {

public $email;
    public $password;
    public $captcha;
    public $rememberMe = false;
    public $userInfo;
	
	
	public function rules() {
        return array(
            array(\'email, password, captcha\', \'required\', \'message\' => \'{attribute}不能为空\'),
            array(\'captcha\', \'checkCaptcha\'),
            array(\'password\', \'authenticate\'),
        );
    }
	
	
	
	public function checkCaptcha($attribute, $params) {
        if (!$this->hasErrors()) {
            $captcha = Yii::app()->session[\'captchaCode\'];
            if (!isset($captcha[\'time\']) || $captcha[\'time\'] + 300 < time()) {
                $this->addError(\'captcha\', \'验证码过期。\');
            } else if (strtolower($captcha[\'content\']) != strtolower($this->captcha)) {
                $this->addError(\'captcha\', \'验证码错误。\');
            }
        }
    }
	
	/**
     * 登陆验证
     * @param type $attribute
     * @param type $params 
     */
    public function authenticate($attribute, $params) {
        if (!$this->hasErrors()) {
            $user = ComUser::model()->findByAttributes(array(\'email\' => $this->email));

            if ($user && $user->password == $user->hashPassword($this->password, $user->salt)) {
                if ($user->status == 1) {
                    $this->userInfo = $user;
                    unset(Yii::app()->session[\'captchaCode\']);
                } else if ($user->status == 0) {
                    $this->addError(\'email\', \'用户暂未审核通过。\');
                } else {
                    $this->addError(\'email\', \'用户已被禁用。\');
                }
            } else {
                $this->addError(\'password\', \'账号或密码错误。\');
            }
        }
    }
	
	public function attributeLabels() {
        return array(
            \'email\' => \'用户名\',
            \'password\' => \'密码\',
            \'captcha\' => \'验证码\',
            \'rememberMe\' => \'记住登陆\'
        );
    }
	
}

　　

 

 

2）.使用yii的验证码物件(参数可自己调试）：

1.把public $captcha加入管理员Model的一个属性

验证rule时：

array(\'username, password, captcha\', \'required\', \'on\'=>\'login\'),

array(\'captcha\', \'captcha\', \'allowEmpty\'=>!extension_loaded(\'gd\'), \'on\'=>\'login\'),

然后控制器实例化时要使用场景。

2.视图页面：

<dt>验证码</dt>
<dd> <?php echo $form->textField($model,\'captcha\', array(\'class\'=>\'input-password verify-code\')); ?>
<?php $this->widget ( \'CCaptcha\', array (\'showRefreshButton\' => true, \'clickableImage\' => true, \'buttonType\' => \'link\', \'buttonLabel\' => \'换一张\', \'imageOptions\' => array (\'alt\' => \'点击换图\', \'align\'=>\'absmiddle\' ) ) );?>
<?php echo $form->error($model,\'captcha\'); ?> </dd>

3.在控制器Controller.php

public function actions ()
{
return array (\'captcha\' => array (\'class\' => \'CCaptchaAction\' , \'minLength\' => 1 , \'maxLength\' => 5 , \'backColor\' => 0xFFFFFF , \'width\' => 100 , \'height\' => 40 ) );
}