&lt;?php$a = &quot;hello&quot;;if &#40;$a.length&#41;    print $a.length;else    print &quot;hi&quot;;?&gt;
A. hellolength
B. 5
C. hi
D. error
Answer:A
&lt;?php$a = &quot;hello&quot;;if &#40;$a.length&#41;    print $a.length;else    print &quot;hi&quot;;?&gt;
A. hellolength B. 5 C. hi D. error
Explanation: The . operator appends a string and returns true.