在另一个视图中访问视图变量-Cakephp

在另一个视图中访问视图变量-Cakephp,cakephp,Cakephp,我有一个名为View1.ctp的视图。在此视图中,我调用了一个名为“Captcha”的控制器函数,其视图为Captcha.ctp。我在view Captcha.ctp中有一个名为$text的变量。我想在View1.ctp中访问此$text变量。我该怎么办? (注:Cakephp版本-2.3) View1.ctp <h1>Add Comment</h1> <?php $post_id= $posts['Post']['id'];

我有一个名为View1.ctp的视图。在此视图中,我调用了一个名为“Captcha”的控制器函数,其视图为Captcha.ctp。我在view Captcha.ctp中有一个名为$text的变量。我想在View1.ctp中访问此$text变量。我该怎么办? (注:Cakephp版本-2.3)
View1.ctp

       <h1>Add Comment</h1>
      <?php
       $post_id= $posts['Post']['id'];
       echo $this->Form->create('Comment',array('action' => 'comment','url' =>          array($post_id,$flag)));
        echo $this->Form->input('name');
        echo $this->Form->input('email');
        echo $this->Form->input('text', array('rows' => '3'));
        echo "Enter Captcha Code:    ";  
        echo $this->Html->image(
       array('controller' => 'posts', 'action' => 'captcha'));
       echo $this->Form->input('code');
       echo $this->Form->end('Add comment'); 
          ?>

         captcha.ctp:

          <?php 
           $this->Session->read(); 
           $text = rand(10000,99996); 
           $_SESSION["vercode"] = $text; 
           $height = 25; 
           $width = 65; 
           $image_p = imagecreate($width, $height); 
           $black = imagecolorallocate($image_p, 0, 0, 0); 
           $white = imagecolorallocate($image_p, 255, 255, 255); 
           $font_size = 14; 
           imagestring($image_p, $font_size, 5, 5, $text, $white); 
           imagejpeg($image_p, null, 80); 
           ?>
添加注释
captcha.ctp:

更好的方法是将Captcha视图改为更合适的。因此,将captcha.ctp移动到app/View/Helper/captchaheloper.php,并将其内容包装在一个类中,如:

<?php
App::uses('AppHelper', 'View/Helper');

class CaptchaHelper extends AppHelper {

    function create() {
        // This line doesn't make much sense as no data from the session is used
        // $this->Session->read(); 

        $text = rand(10000, 99996); 

        // Don't use the $_SESSION superglobal in Cake apps
        // $_SESSION["vercode"] = $text; 

        // Use SessionComponent::write instead
        $session = new SessionComponent(new ComponentCollection());
        $session->write('vercode', $text);

        $height = 25; 
        $width = 65; 
        $image_p = imagecreate($width, $height); 
        $black = imagecolorallocate($image_p, 0, 0, 0); 
        $white = imagecolorallocate($image_p, 255, 255, 255); 
        $font_size = 14; 
        imagestring($image_p, $font_size, 5, 5, $text, $white);

        // Return the generated image
        return imagejpeg($image_p, null, 80);
    }

}
(或者,如果已经有一个helpers数组,只需将其附加到该数组中即可。)

然后,从View1.ctp中,您只需调用帮助器即可返回图像:

echo $this->Html->image($this->Captcha->create());

它的“预期”值将存储在会话键
vercode
中,您也可以在表单处理逻辑中从PostsController读取该值。

但是先生,我需要在另一个控制器CommentsController.php中访问此vercode,而不是在PostsController.ctpI中。我收到此错误先生。错误:调用成员函数read()在非-object@user1479469该错误来自
$this->Session->read()
,这在Helper函数中没有任何意义,因此我将完全删除该行。要从另一个控制器读取会话密钥,只需从该控制器使用
SessionComponent::read('vercode')
。oki sir..我改变了..我得到了这个错误-不应该静态调用非静态方法SessionComponent::write(),假设$this来自不兼容的上下文[APP\View\Helper\captchaheloper.php,第47行]确定,在这种情况下,将SessionComponent添加到控制器的
$components
数组中:
public$components=array('Session')$this->Session->read('vercode')取而代之。
echo $this->Html->image($this->Captcha->create());