&lt;?php    $op2 = &quot;blabla&quot;;    function foo&#40;$op1&#41;    &#123;        echo $op1;        echo $op2;    &#125;    foo&#40;&quot;hello&quot;&#41;;    ?&gt;
A. helloblabla
B. Error
C. hello
D. helloblablablabla
Answer:A
&lt;?php    $op2 = &quot;blabla&quot;;    function foo&#40;$op1&#41;    &#123;        echo $op1;        echo $op2;    &#125;    foo&#40;&quot;hello&quot;&#41;;    ?&gt;
A. helloblabla B. Error C. hello D. helloblablablabla
Explanation: If you want to put some variables in function that was not passed by it, you must use “global”. Inside the function type global $op2.