如何在此代码中使用Php比较和三元运算符？

Question

I've been reading the documents and trying to make a piece of code work to no avail. I'm wanting to check a radio input if the value matches the one in the database. I'm posting the relevant piece of code.

Original if statement

if(isset($_POST['radioValue'])){
if($prospectAnswer == $script[$getScriptAA]){
echo 'checked="checked';}}

What I have tried so far...

$input .=  ' <input  
'.((isset($_POST['radioValue']) 
&& ($prospectAnswer == $script[$getScriptAA])) ? 'checked="checked').'
              type="radio" 
              name="sAnswer" 
              value="'.$script[$getScriptAA].'">
<span class="radiotext"> '.$script[$getScriptAA].'</span>';

Answer 1

Looks like your code is missing the 2nd part of the ternary, add : '' after 'checked="checked"' .

$input .=  ' <input  
'.(isset($_POST['radioValue']) && $prospectAnswer == $script[$getScriptAA] ? 'checked="checked"' : '').'
              type="radio" 
              name="sAnswer" 
              value="'.$script[$getScriptAA].'">
<span class="radiotext"> '.$script[$getScriptAA].'</span>';