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up vote 4 down vote favorite

This question already has an answer here:

I have been working with a form submission in joomla and have a few trouble using javascript variable with php JRoute_

Here is the code snippet:

function ValidateForm()
{
    var loc = $("#locality").val();
    var action = '<?php echo JRoute::_('index.php?option=com_add&view=malllists&Itemid=233&districtname='.$dit.'&loc='Pass javascript Variable Here) ;?>';
    document.miniSurveyView481.action = action;
}

In the place of Pass javascript Variable Here I need to pass the loc value I tried plenty of things but Could not find a solution.

share|improve this question

marked as duplicate by Felix Kling, kuroi neko, Robbie Averill, Mark Bell, Patrick Hofman Feb 12 '14 at 9:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
    
Read this: stackoverflow.com/questions/2379224/… – Preprocezzor Feb 12 '14 at 7:36
    
you need to improve the formulation of question. The quotes are unnecessarily causing confusion. Also echo values must be in quotes. Please try to convey exactly what you want! – Puneet Feb 12 '14 at 7:40
up vote 5 down vote accepted

You can't use javascript variable in php code. Php code run's on the serverside and javascript code runs in the client side. You can't ask the browser to run php code.

Your variable loc will have a value only when the code reaches the browser.

If you want to get some value from server and combine it with javascript variables then do the following.

Use an ajax request and send the desired values to server. The server will return with a response. Use that response text and store it in your action variable.

share|improve this answer
    
Is there any alternative solution for this??? – Amit Feb 12 '14 at 7:54
    
@amit I have edited my answer. – Konza Feb 12 '14 at 7:58
up vote 0 down vote 
function ValidateForm()
{
    var loc = $("#locality").val();
    var action = <?php echo json_encode(JRoute::_('index.php?option=com_add&view=malllists&Itemid=233&districtname=' . $dit));?>';
    // Now action is the url  you want, but you need to add loc to it. 
    // If it already has a query string, do it like this:
    document.miniSurveyView481.action = action + '&loc=' + loc;
    // If it does not have a query string, do it like this:
    document.miniSurveyView481.action = action + '?loc=' + loc;
}

So the real question here is, "how do you determine if the url has a query string already?"

You might want to try this: http://medialize.github.io/URI.js/

share|improve this answer
    
I need to pass the loc value to JRoute Okonomiyaki3000 in order to have a sef url.. – Amit Feb 12 '14 at 8:03
    
It's not really all that important that URLs used by javascript be SEF but if it's important to YOU that they be so, then you should create a service that you can pass some variables with an ajax request and it will run JRoute for you and return the SEF url to your javascript function. Kind of troublesome if you ask me. – Okonomiyaki3000 Feb 12 '14 at 8:24
    
I'm not sure if it's available in the version of joomla that you're using but there's a component called com_ajax which you can use to do some interesting things. By itself, it does nothing. But you can write a plugin or a module (I'd recommend a plugin) for it. So let's say you write a plugin called plg_ajax_jroute which should have a function called onAjaxJroute. You would make a call to index.php?option=com_ajax&plugin=jroute&data=<yourSpecificDa‌​taHere> and then, in your plugin, handle that stuff. Sorry, I can't tell you exactly how to do it here but you've given me a good idea. – Okonomiyaki3000 Feb 12 '14 at 9:16
up vote 0 down vote

In Joomla Standard you have to try something like this.

From your code you're trying to set the action of the form from JavaScript.

In Joomla you have to create hidden fields for setting those url params like.

<input type='hidden' name='option' value='com_add' />
<input type='hidden' name='view' value='malllists' />
<input type='hidden' name='controller' value='malllists' />
<input type='hidden' name='task' value='yourtaskname' />

Once you set up these thing properly on form submission Joomla post the data to your controller file contain yourtaskname. These variable values can be easily changed from JavaScript using normal JavaScript/Jquery.

Then there is no need of using PHP codes inside JavaScript or something like that.

Hope it make sense..

share|improve this answer
    
Down Voter should explain the reason. – Jobin Jose Feb 12 '14 at 9:16
1  
I've upvoted you as the only person to use Joomla standards – Lodder Feb 12 '14 at 9:19
    
It wasn't me, but I can tell you that this doesn't really address the problem in the question. If you read it more carefully, you'll understand. What he's doing might not be exactly the 'standard' joomla way but we have to assume he has some reasons for the way he is doing it. – Okonomiyaki3000 Feb 12 '14 at 9:19
    
@Okonomiyaki3000 this much explanation is not sufficient for the answer! he just need to set another hidden fields with name loc and set the value using javascript inside validation code Job Done! he has some reason for doing this( may be ) .The fact is he needs to get the loc value as a post param. I think my answer is sufficient for his task. thanks. – Jobin Jose Feb 12 '14 at 9:25
1  
I'm not saying your answer is wrong. In fact, it's how I'd probably do it. I'm just saying that it looks like he's doing some non-standard stuff here and whether he has a good reason for that or not is outside the scope of this question. – Okonomiyaki3000 Feb 12 '14 at 9:36
up vote -7 down vote

I think $dit is also php variable. Try to use below:- 

function ValidateForm()
{
    var loc = $("#locality").val();
    var url = "index.php?option=com_add&view=malllists&Itemid=233&districtname=<?php echo $dit;?>&loc="+loc;
    var action = "<?php echo JRoute::_(url) ;?>";
    document.miniSurveyView481.action = action;
}

Edit:-

for passing javascript value to php function I do below:-

<script type="text/javascript">
function test()
{
    var pt = 3;
    document.write('<?php add("'+pt+'");?>');
}

test();
</script>

<?php

function add($param)
{
    echo $param;
}  
?>

and it's perfectly printing 3 .

So may be the below code will work for OP:-

function ValidateForm()
{
    var loc = $("#locality").val();
    var url = "index.php?option=com_add&view=malllists&Itemid=233&districtname=<?php echo $dit;?>&loc="+loc;
    var action = '<?php echo JRoute::_("'+url+'") ;?>';
    document.miniSurveyView481.action = action;
}

Try once. Thanks.

share|improve this answer
    
How are you gonna run the php function JRoute::_() on the javascript variable url? – Okonomiyaki3000 Feb 12 '14 at 7:51
    
@Okonomiyaki3000 , :( I also realize the actual problem after posting answer. Sorry for bad answer. – ripa Feb 12 '14 at 7:56
    
Please, just stop. – Okonomiyaki3000 Feb 12 '14 at 8:38
    
@Okonomiyaki3000 Your above comment not clear to me. are u ordering me to stop editing my answer? have u tried any one of my edited code? – ripa Feb 12 '14 at 8:47
1  
What you wrote is completely wrong. PHP is run on the server side, JavaScript on the client. At the moment the PHP code runs, the pt variable doesn't exist. It only seems to work, because what the PHP sees is add("'+pt+'");, i.e. you are passing the string "'+pt+'" to the function, which just outputs it again. Hence the generated JavaScript code will be document.write(''+pt+'');. So when this code runs, it will indeed print 3, but not because the JS variable was passed to PHP, but because the PHP code generated JavaScript that makes use of the variable pt. – Felix Kling Feb 12 '14 at 9:02

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