如何在foreach（PHP）之后将某些东西附加到textarea值

Question

好的，试着解释一下。我有一张桌子：

<tr>
<td>Some specific question 1</td>
<td><input type="radio" name="v29" value="Some specific question: standart answer 1" checked="" >Standart answer 1<br>
<input type="radio" name="v29" value="Some specific question: standart answer 2">Standart answer 2<br>
<input type="radio" name="v29">or print your answer<br>
<textarea name="v29" cols="50" placeholder="Enter text here" ></textarea></td>
</tr>
<tr>
<td>Some specific question 2</td>
<td><input type="radio" name="v30" value="Some specific question: standart answer 1" checked="" >Standart answer 1<br>
<input type="radio" name="v30" value="Some specific question: standart answer 2">Standart answer 2<br>
<input type="radio" name="v30">or print your answer<br>
<textarea name="v30" cols="50" placeholder="Enter text here" ></textarea></td>
</tr>
<tr>
<td>Some specific question 3</td>
<td><input type="radio" name="v31" value="Some specific question: standart answer 1" checked="" >Standart answer 1<br>
<input type="radio" name="v31" value="Some specific question: standart answer 2">Standart answer 2<br>
<input type="radio" name="v31">or print your answer<br>
<textarea name="v31" cols="50" placeholder="Enter text here" ></textarea></td>
</tr>
<input type="submit" name="submitgop" style="margin-right:7px;  margin-left:7px;" value="Save"> 

“submitgop”按钮启动：

foreach ($_POST as $key => $value) {
    $answerText[$i] = $value;
    $i++;
}

前两个按钮将从表中返回完美的“问题：答案”对。但是当用户选择第三个按钮时，它只返回“回答”。我想修复它，并以某种方式将“Question：”添加到第三个按钮的值（即textarea）。