receiving radio box value in php

Question

I have 2 following radio boxes in a form,

<input type="radio" name="radio" value="yes" class="radio" /> Yes
<input type="radio" name="radio" value="no" class="radio" /> No

1. How can i recieve the value of the radio button once the form is posted (in PHP)
2. Once it is posted on the same page, how can I remember the selected radio button and keep that checked? Thanks.

Answer 1

1) The value of the radio button is saved in $_POST only if any of the choices was selected.

if (isset($_POST['radio']))   // if ANY of the options was checked
  echo $_POST['radio'];    // echo the choice
else
  echo "nothing was selected.";

---

2) Just check for the value and add checked='checked' if it matches.

<input type="radio" name="radio" value="yes" class="radio" <?php if (isset($_POST['radio']) && $_POST['radio'] == 'yes'): ?>checked='checked'<?php endif; ?> /> Yes
<input type="radio" name="radio" value="no"  class="radio" <?php if (isset($_POST['radio']) && $_POST['radio'] ==  'no'): ?>checked='checked'<?php endif; ?> /> No

Answer 2

<input type="radio" name="radio" value="yes" class="radio" /> Yes
<input type="radio" name="radio" value="no" class="radio" /> No

 u get radio value using $_POST['radio'];

simple bro,

<input type="radio" name="radio" <?php if($_POST['radio']=="yes") echo "checked";?> value="yes" class="radio" /> Yes

u have to identify radio box by value man