Simulating form submit with a jquery ajax call

Question

I have a chunk of code that defines divs and some of the callbacks on them when clicked. To avoid code redundancy, I want to reuse it. The callbacks use $.post calls to communicate with the server whereas, for this specific page, I want a page refresh the way a form submit does.

Is there any difference in using a form submit to submitPage.php and using the following?

$.post('submitPage',  dataParams, null, 'json').
      success(function(resp, status, req) {
        window.location = 'submitPage.php';  // redirect
      });

I am curious about how this might intrinsically effect the processing of entries in dataParams by submitPage.php.

the only difference i see it there will not be a post back event — tmjam
– tmjam, Commented Nov 29, 2011 at 20:12

Jasper · Accepted Answer · 2011-11-29 20:12:30Z

1

The difference is that when you submit a form normally, the page request also has the data serialized along with it. You are submitting the form as an AJAX request and then redirecting the user to a page without the serialized form data attached.

So if you need the $_POST variable to be accessible on the submitPage.php then I would let the form submit normally rather than hi-jacking the submit with an AJAX request and then redirecting the user.

You could add the $_POST data to the $_SESSION and then use that when you redirect the user but unless you have a reason to do that it seems like an unnecessary bit of code.

answered Nov 29, 2011 at 20:12

Jasper

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3 Comments

Navneet Over a year ago

So, the processing on the data happens when the server processes the post request. After that, I don't need reprocessing. So not sending data the second time might be ok right? Would this work out?

Jasper Over a year ago

@Navneet The issue I could see happening is that submitPage.php uses $_POST variables to populate itself with data, if that's the case then when you redirect the user these variables will not be there for the submitPage.php page.

Navneet Over a year ago

I see that problem. Was using isset() to check but I am starting to get the feeling that might be too hacky a solution. :)

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