What is the difference between ' and "?

When you use echo and print you may sometimes wonder which to use or what the difference is. This is a very common question and source of confusion.

The single quotes will print everything inside them literally, including variables, e.g. $var will print as $var, whereas with double quotes the contents will be interpolated.

Here we make the difference clear with a natty example:


<?php

$trings = "No strings attached";

echo '$trings'; //$trings



echo "$trings"; //No strings attached

?>

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What is the difference between ' and "?

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