Single vs. Double Quotes

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Double Quotes

I study in Milwaukee.

Single Quotes

I study in $city.

Double Quotes with New Line

Line one
Line two

Single Quotes with New Line

Line one\nLine two

Explanation

Double quotes allow PHP to read variables and special characters inside a string. For example, the variable $city changes to Milwaukee when double quotes are used. Single quotes treat the text more literally, so the variable name is shown instead of its value. New line characters also work differently with single and double quotes.