I need to make a DOM substitution, something like this:
$("#target").html('<?php echo $html?>');
where the $html variable could be a complex markup
$html = '<div>
<input type="text" name="test" />
</div>';
Of course I need some kind of escaping, or the javascript engine will break for a syntax problem at the first crlf or quote. In rails there's a simple function escape_javascript that makes it very easy. Is there anything similar in cakephp?
I think using
$("#target").html('<?php echo $this->element("element_path"); ?>');
makes more sense. But it depends on what is in your element_path.ctp file.
On the other hand, it's a bit weird to put replacement HTML in like this. Espacially if it's a lott, I would make an ajax call to load the HTML and have a Controller function return the contents of the element.
$("#target").html('Loading...').load('/myController/loadHtml/');
and the myController
function loadHtml(){
$this->layout = false;
}
and the view for the function app/View/my/load_html.ctp:
<?php echo $this->element("element_path"); ?>
you can do this by using requestAction
in your view file add the below code
$html = $this->requestAction('/tests/func_name');
echo $this->Html->scriptBlock('
$("#target").html('. $this->Js->value($html) .');
');
And in your TestsController.
public function func_name() {
$this->layout = 'layout_name'; // The layout you want here for design.
$this->render('/Elements/element_name'); // you can directly render the content of element by writing like this.
}
Related
I've developed a CakePHP plugin that allows the site administrator to define custom reports as a list of SQL queries that are executed and the results displayed by a .ctp template.
Now I need to allow the administrator to edit the template, stored in the DB together with the report.
Therefore I need to render a template that is inside a string and not in a .ctp file and I could not find anything in the core that helps.
I considered initially the approach to write the templates in .ctp files and load them from there, but I suspect this solution is rigged with flaws re: the location of the files and related permissions.
A better solution seems to override the View class and add a method to do this.
Can anyone suggest a better approach ?
P.S. Security is not a concern here, since the administrator is basically a developer without access to the code.
In CakePHP 2.0:
The View::render() method imports the template file using
include
The include statement includes and evaluates the specified file.
The evaluated template is immediately executed in whatever scope it was included. To duplicate this functionality, you would need to use
eval()
Caution: The eval() language construct is very dangerous because it
allows execution of arbitrary PHP code. Its use thus is discouraged.
If you have carefully verified that there is no other option than to
use this construct, pay special attention not to pass any user
provided data into it without properly validating it beforehand.
(This warning is speaking to you, specifically)
...if you wish to continue... Here is a basic example of how you might achieve this:
$name = 'world';
$template = 'Hello <?php echo $name ?>... <br />';
echo $template;
// Output: Hello ...
eval(' ?>' . $template . '<?php ');
// Output: Hello world...
Which is (almost) exactly the same as:
$name = 'world';
$template = 'Hello <?php echo $name ?>... <br />';
file_put_contents('path/to/template.php', $template);
include 'path/to/template.php';
Except people won't yell at you for using eval()
In your CakePHP application:
app/View/EvaluatorView.php
class EvaluatorView extends View
{
public function renderRaw($template, $data = [])
{
if (empty($data)) {
$data = $this->viewVars;
}
extract($data, EXTR_SKIP);
ob_start();
eval(' ?>' . $template . '<?php ');
$output = ob_get_clean();
return $output;
}
}
app/Controller/ReportsController.php
class ReportsController extends AppController
{
public function report()
{
$this->set('name', 'John Galt');
$this->set('template', 'Who is <?php echo $name; ?>?');
$this->viewClass = 'Evaluator';
}
}
app/View/Reports/report.ctp
// Content ...
$this->renderRaw($template);
Alternatively, you may want to check out existing templating engines like: Mustache, Twig, and Smarty.
Hmmm.. Maybe create a variable that will store the generated code and just 'echo' this variable in ctp file.
I had similar problem (cakephp 3)
Controller method:
public function preview($id = null) {
$this->loadModel('Templates');
$tempate = $this
->Templates
->findById($id)
->first();
if(is_null($template)) {
$this->Flash->error(__('Template not found'));
return $this->redirect($this->referer());
}
$html = $template->html_content;
$this->set(compact('html'));
}
And preview.ctp is just:
<?= $html
I am having an issue setting variables in the controller and showing it at the view.
my codes are as follow:
In my view (pages/anything.ctp):
<?php echo $anything; ?>
In my controller (pagesController.php):
public function anything() {
$a = "asdasdas";
$this->set('anything', $a);
}
I am new to Cake, and I've done quite a number of search in google and stack. Still no luck.
I'd be grateful if anybody could help, or if anyone already asked this question before please provide a link that would be best.
First read the following article Controller actions in CakePHP CookBook
When you use controller methods with requestAction(), you will often want to return data that isn’t a string. If you have controller methods that are used for normal web requests + requestAction, you should check the request type before returning:
class RecipesController extends AppController {
public function popular() {
$popular = $this->Recipe->popular();
if (!empty($this->request->params['requested'])) {
return $popular;
}
$this->set('popular', $popular);
}
}
The above controller action is an example of how a method can be used with requestAction() and normal requests. Returning array data to a non-requestAction request will cause errors and should be avoided. See the section on requestAction() for more tips on using requestAction()
Try this:
public function anything() {
$a = "asdasdas";
$this->set(compact('a'));
}
<?php echo $a; ?>
As I am including elements/header.ctp file in another main.ctp file..
<?php echo $this->element('header'); ?>
I have included header in main.ctp it is displaying quite good. but when I am writing the query in ElementsController in is throwing an error undefined varible..
Below code for Elements Controller header() is the included file function.
public function header()
{
$this->set('marquee',$this->Newsmaster->find('all',array('order'=>array('Newsmaster.priority DESC'),'limit' =>20)));
$userid = $this->Session->read('user');
}
can anyone help me in solving this please... thank You
Elements Controller is not needed to set "marquee" varaible , you need to code in your usual controller for eg. for pages/index you will need to set variable in PagesController's index function not in under ElementsController
I seem to be beaten at the very first hurdle on this one, I can't seem to get a basic "Hello world" going on in cake PHP.
in /app/Controller/MyController.php I have:
public $helpers = array('Js' => array('Jquery'), 'Html', 'Form');
public $components = array('RequestHandler');
in /app/View/Layouts/default.ctp I have:
echo $this->Html->script('//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js');
echo $this->fetch('script');
echo $this->Js->writeBuffer();
?></head>
in /app/View/My/index.ctp I have:
$this->Js->alert('HelloWorld');
but I get no alerts! If I try:
echo $this->Js->alert('HelloWorld');
it prints out to the browser: (double quotes instead of the typed single quotes!?)
alert("HelloWorld");
but not wrapped in < script > tags or even a $(document).ready(function(){});
Have I missed something out?
JsHelper is pretty useless to be honest. I don't even bother with it properly, I just include JavaScript in my site as I would normally, but using Cake's methods to keep it within the framework.
Example layout would have jQuery included in the <head> like this:
app/View/Layouts/default.ctp
<head>
<?php
// Include jQuery
echo $this->Html->script('jquery-1.8.2.min');
// Want to send some glabal values to your scripts?
$this->Js->set(array(
'TEST' => 'Hello World',
'ROOT' => $this->Html->url( '/', true)
));
echo $this->Js->writeBuffer(array('onDomReady' => false));
// Include any other scripts you've set
echo $this->fetch('script');
?>
</head>
Then in your view, you might want to include a specific script for that page:
app/View/Pages/test.ctp
<?php echo $this->Html->script('test.js'); ?>
And you just keep all your JavaScript as usual in an external script:
app/webroot/js/test.js
$(document).ready(function() {
/**
* Alert the value we set in our layout. All JS vars that have been
* set are available in your JavaScript via the window.app object.
*/
alert(window.app.TEST + ' sent from ' + window.app.ROOT);
});
The general consensus is don't bother using the JsHelper, and is likely being removed in Cake 3 in any case.
I would put echo $this->Js->writeBuffer(); before </body>
I am not sure on the exact workings but I think your JS is working with echo because it is being output in the middle of your view, so when the page loads, it alerts. (The JS will be in the middle of your HTML output) rather than in the <head> or before </body>
The writeBuffer is being called before the view file is processed; so your view js does not get added to the buffer. I could be incorrect however.
Set the write buffer at the end of each ctp file and it should work
I have function in app_controller.php.The function is like:
function globalSum($Var1,$Var2)
{
$Var3 = $Var1 + $Var2;
return $Var3;
}
Now I want to access this function from any CTP file to get the value after sum.when I call this function the arments will be send from the ctp file.
So,anybody can tell me how to call this function with arguments from the ctp file??
Thanks in advance..
The way you're trying to do this probably isn't the best, seeing as it's working against the MVC architecture that CakePHP uses.
In MVC, the ctp file is your view and should only act as a template, to the greatest extent possible, with any values that you need in the view should be passed to it from the controller.
You have a number of simple solutions to your problem.
One is simply to do the addition in the view:
index.ctp
<?php
echo $var1 + $var2
?>
For such a simple operation, why bother with a separate function?
If your function is more complicated, you can put it in the AppController and then set the view variable in the controller that the action belongs to. For example:
app_controller.php
<?php
function globalSum($Var1,$Var2) {
$Var3 = $Var1 + $Var2;
return $Var3;
}
?>
posts_controller.php
<?php
function index() {
$this->set('var3', $this->globalSum($var1,$var2));
}
?>
index.ctp
<?php
echo $var3;
?>
Hope that helps.