PHP files have a default file extension of..

PHP files have a default file extension of..

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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?

function track()
  {
 	static $count = 0;
  $count++;
 	echo $count;
 }
 track();
 track();
 track();

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

$score = 1234;
 $scoreboard = (array) $score;
 echo $scoreboard[0];

4) Which of following variables can be assigned a value to it?

1. $3hello
2. $_hello
3. $this
4. $This

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