php - Can't $_POST values from disabled Radio buttons - Stack Overflow

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I have two pages, in the first page I submit the form which contains Radio buttons.

From the second page, I try to read the responses from the Radio buttons using the $_POST.

The problem is when I hit submit, the $_POST in the second page reads NULL. But when I'm not disabling the Radio buttons in the first page the $_POST form the second page reads the data from the Radio butons correctly.

Is there any solution to make the $_POST reads the values of disabled Radio buttons?

I'm using this Javascript code to disable the radio buttons when the user clicks on it:

function disableRadio(groupName){
        var radio=document.getElementsByName(groupName);
        for(c=0;c<radio.length;c++)
            radio[c].disabled=true;
}

Here is a simple code from each of the two pages.

Page1:

echo '<form action="Page2.php" method="post">',
     "<input type='radio' name='Question1' value='1' onClick='disableRadio(Question1)' />",
     "<input type='radio' name='Question1' value='2' onClick='disableRadio(Question1)' />",
     "<input type='radio' name='Question1' value='3' onClick='disableRadio(Question1)' />",
     "<div><input type='submit' value='Submit'></div>",
     "</form>";

Page2:

$response=$_POST['Question1'];
echo $response;

---

Update to this question

When using the ReadOnly attribute, the Radio buttons in the group are still click-able. So, I decided to Disable the other Radio buttons. Is there a better solution, as I don't want the user to have the feeling that he is able to change the answer.

I have two pages, in the first page I submit the form which contains Radio buttons.

From the second page, I try to read the responses from the Radio buttons using the $_POST.

The problem is when I hit submit, the $_POST in the second page reads NULL. But when I'm not disabling the Radio buttons in the first page the $_POST form the second page reads the data from the Radio butons correctly.

Is there any solution to make the $_POST reads the values of disabled Radio buttons?

I'm using this Javascript code to disable the radio buttons when the user clicks on it:

function disableRadio(groupName){
        var radio=document.getElementsByName(groupName);
        for(c=0;c<radio.length;c++)
            radio[c].disabled=true;
}

Here is a simple code from each of the two pages.

Page1:

echo '<form action="Page2.php" method="post">',
     "<input type='radio' name='Question1' value='1' onClick='disableRadio(Question1)' />",
     "<input type='radio' name='Question1' value='2' onClick='disableRadio(Question1)' />",
     "<input type='radio' name='Question1' value='3' onClick='disableRadio(Question1)' />",
     "<div><input type='submit' value='Submit'></div>",
     "</form>";

Page2:

$response=$_POST['Question1'];
echo $response;

---

Update to this question

When using the ReadOnly attribute, the Radio buttons in the group are still click-able. So, I decided to Disable the other Radio buttons. Is there a better solution, as I don't want the user to have the feeling that he is able to change the answer.

• php
• javascript

Share Improve this question Follow edited Jul 26, 2012 at 23:52 user1483799 asked Jul 25, 2012 at 21:11 user1483799user1483799 40944 gold badges88 silver badges1717 bronze badges 1

• Create hidden input fields and set their value to match the radio buttons. – j08691 Commented Jul 25, 2012 at 21:14

Add a ment  | 

5 Answers 5

Sorted by: Reset to default 5

Disabled inputs do not submit their values.

You could set them to be readonly instead, if this behaviour suits your situation.

Q: Is there any way to get sound out of my handset after I've hit the "off" button?

A: No, try hitting "mute" instead :)

There's a difference between "disabled" (this input is turned OFF) and "readonly" (has a value, but user can't tamper with it):

• http://www.w3schools./tags/att_input_readonly.asp

'Hope that helps .. PSM

You can set a hidden value to use a proxy for the radio button, and depending on the radio button's state set it, that way you can still disable the radio button and always have a value for what you want.

You should use readonly instead of disabledon the input elements.

You may be better off using <input type="hidden">, and if you really need the user to see what they submitted earlier then you can add a set of disabled radio buttons with no name to show it.

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