Which one is fastest if $a = 10; echo "Output is: {$a}"; echo "Output is " . $a; echo 'Output is ' . $a; echo "Output is $a";

Answer 1

No difference you could think of which one is easiest but I think its more preference and some situations one might be easier than the other.
Not much time difference

Answer 2

1

Answer 3

For better performance i suggest to use the number 3

Answer 4

4

Answer 5

2 and 3

Answer 6

I think 3.