A PHP script should start with ___ and end with ___:

A PHP script should start with ___ and end with ___:

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1) What will be the output of the following php code?

 $num  = 1;
 $num1 = 2;
 print $num . "+". $num1;
 ?>

2) What will be the output of the following code?

  $foo = 'Bob';
 $bar = &$foo;
         $bar = "My name is $bar";
 echo $bar;
 echo $foo;
 ?>

3) What will be the output of the following PHP code?

$num = 10;
 echo 'What is her age? n She is $num years old';

4) What will be the output of the following PHP code?

$total = "25 students";
 $more = 10;
 $total = $total + $more;
 echo "$total";

5) Which of the below statements is equivalent to $add += $add ?