2.2 questions

 Question 1 1 pts

Get the length of the string "Hello World!".

echo ("Hello World!");

 Question 2 1 pts

Reverse the string "Hello World!".

echo ("Hello World!");

 Question 3 1 pts

Replace the word "World" from the $oldtxt variable with the word "Dolly" in the $newtxt variable.

$oldtxt = "Hello World!";
$newtxt = ( , , )