PHP doesn't process the form

Question

I'm having a little problem here.
I have a form with a jQuery that disables the submit input when the form is submited.
The problem is: I use PHP to process the data when the input submit is clicked. But apparently the button is being disabled first, then PHP can not perform the processing. I need to find a way to prevent this, take a look in the code snippets:

<form class='send' action='{$_SERVER['PHP_SELF']}' method='post'>
    <!--Form data-->
    <input type='submit' name='finish' value='Send'/>
</form>

jQuery function to disable:

$('.send').on('submit', function()
{
    $(this).find('input[type="submit"]').prop("disabled", true);
});

And then the PHP code to process:

if(isset($_POST['finish']))
{
    //Do things
}

As I said, the PHP don't process the form because JS disabled the button to prevent multiple submitions. How to process PHP before disable the button? Thanks!

I think the problem is the PHP script never receives the data because you've disabled submission. I assume you're wanting to prevent a refresh? You need to use AJAX. On click, disable the button. On success, let the user know/enable the button again. — Narong
– Narong, Commented Apr 29, 2015 at 16:05
disabling the input means it's name/value pair won;t be sent. What is importance of it being set in the php? — charlietfl
– charlietfl, Commented Apr 29, 2015 at 16:07
Provided it doesn't violate any specifications you are working towards, you could just hide the button? $(this).find('input[type="submit"]').hide();. I know it's shamelessly q&d, (and no one learns anything). But hey ho — ne1410s
– ne1410s, Commented Apr 29, 2015 at 16:09
Why don you just use preventDefault(); ? i.e.: stackoverflow.com/a/5169572/797495 — Pedro Lobito
– Pedro Lobito, Commented Apr 29, 2015 at 16:11
@PedroLobito I want to disable the button, but after PHP process. — Dyan
– Dyan, Commented Apr 29, 2015 at 16:34

FastFarm · Accepted Answer · 2015-04-29 16:07:48Z

2

Since you are disabling the submit button it will not get send over to to server in the $_POST variable so your code doesn't work, as you have said.

Another way to do what you are looking for is to create a hidden HTML input

<input type="hidden" name="form">

Then when you check if the form is send, you will use

if(isset($_POST['form']))
{
    //Do things
}

answered Apr 29, 2015 at 16:07

FastFarm

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5 Comments

Dyan Over a year ago

I know, but I need to disable after the PHP process.

FastFarm Over a year ago

Can you give us some more information? Why do you need to disable the input and what do you want to achieve?

Dyan Over a year ago

Well, the rest of my code would be irrelevant and would only make the question extensive. I basically need the PHP to be processed before disabling the button.

FastFarm Over a year ago

I meant why do you need to disable the form after sending the data? When you send the form, you get redirected to the page you specify in the form's action, so doing anything after sending the form is irrelevant. You can always use AJAX to send the form without getting redirected to another page

Dyan Over a year ago

Thank you for the code and for all information! Hide the input worked great! :)

kosmos · Accepted Answer · 2015-04-29 16:11:45Z

1

You can solve it easily changing your submit button by a simple button:

<form class='send' action='{$_SERVER['PHP_SELF']}' method='post'>
    <!--Form data-->
    <input type='button' name='finish' value='Send'/>
</form>

$('input[name="finish"]', '.send').on('click', function(){
    $(this).prop('disabled', true);
    $('.send').submit();
});

answered Apr 29, 2015 at 16:11

kosmos

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