setting default value to radio button php - php

Question

i want to set a default value to radio buttons for my form. the default value should match the value from database. i know how to set default value that is my by using checked="checked". in my case, the problem lies in how to use database value as default in radiobuttons.
<tr>
<td>ASP.NET</td>
<td><input type="radio" name="asp" value="not at all competent" ></td>
<td><input type="radio" name="asp" value="little competent" ></td>
<td><input type="radio" name="asp" value="moderately competent"</td>
<td><input type="radio" name="asp" value="extremely competent"></td>
</tr>

Answer 1

You can do it like the following:
<?php
//Retrieve your value here
$query="select * from technical_skills where student_id='$student_id'";
$result=mysqli_query($conn,$query);
$row=mysqli_fetch_array($result);
// Assign the column to the variable
$dbValue = $row['columnname'];
?>
<tr>
<td>ASP.NET</td>
<td><input type="radio" name="asp" value="not at all competent"<?php echo ($dbValue=='not at all competent'?' checked=checked':''); ?> ></td>
<td><input type="radio" name="asp" value="little competent"<?php echo ($dbValue=='little competent'?' checked=checked':''); ?> ></td>
<td><input type="radio" name="asp" value="moderately competent"<?php echo ($dbValue=='moderately competent'?' checked=checked':''); ?> ></td>
<td><input type="radio" name="asp" value="extremely competent"<?php echo ($dbValue=='extremely competent'?' checked=checked':''); ?> ></td>
</tr>

Answer 2

You can define an empty variable for each option and set them to 'checked=checked' according to the DB returned value.
example:
$not_competent = ''
if($dbResult == 'not_competent') $not_competent = 'checked=checked';
Do the same with the other options and then print the table.
Write the table between "..." so PHP can pharse the variables and show
the proper info
print "<tr>
<td>ASP.NET</td>
<td><input type='radio' name='asp' value='not at all competent' $not_competent></td>
<td><input type='radio' name='asp' value='little competent' $little competent></td>
<td><input type='radio' name='asp' value='moderately competent' $moderately_competent></td>
<td><input type='radio' name='asp' value='extremely competent' $extremely_competent></td>
</tr>";
Cheers!