PHP files have a default file extension of..
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1) Which of the below statements is equivalent to $add += $add ?
2) What will be the output of the following PHP code?
$score = 1234;
$scoreboard = (array) $score;
3) Which of following variables can be assigned a value to it?
4) Which of the below symbols is a newline character?
5) We can use _________ to comment a single line?