&lt;?php$a  =  '12345';echo &quot;qwe$arty&quot;;?&gt;
A. qwe12345rty
B. qwe$arty
C. qwe
D. error
Answer:A
&lt;?php$a  =  '12345';echo &quot;qwe$arty&quot;;?&gt;
A. qwe12345rty B. qwe$arty C. qwe D. error
Explanation: qwe, because $a became $arty, which is undefined.