Here we can see that we can add quotations into a paragraph since PHP gets confused if we use double quotations twice
Kevin asks, "What kind of car do you drive?"In conclusion, Single quotes are taken literally. Everything in them is passed through AS IS. Double quotes are interpreted. They will translate variables (and other) into their respected values. Double quotations are best for substituting string/integer variables where as single quotation marks are best used when discussing anything literal and use knowingly that what ever you type will be the output.