What is defference between ' & " for echo in php?

Answer 1

In double quation we can use variable by using curly brackets like <?php echo "hi {$var} , how are you?"; ?> The same can not be done in single quotation.

Answer 2

you can place variables inside " but you cannot inside single quotation '

let's say you have a variable called $name and you want to print Hi followed by the value of the name variable:

$name ="Vishal";

echo "Hi $name":

or

echo "Hi {$name}":

these will print Hi Vishal

but when using single quotation:

echo 'Hi $name':

it will print Hi $name not Hi Vishal: