What is the significance of using double quotes versus single quotes when trying to output special characters like line breaks in PHP?

Using double quotes in PHP allows for the interpretation of special characters like line breaks (\n) or escape sequences, while single quotes do not interpret these special characters. Therefore, when trying to output special characters like line breaks in PHP, it is important to use double quotes to ensure that the special characters are processed correctly.

// Using double quotes to output a string with a line break
echo "First line\nSecond line";