Difference between single and double quotes in PHP
In this article we will learn the difference between single and double quotes in PHP, when we must choose each of the formats.

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The Single Quotes
According to the documentation this is the simplest way to specify a string by enclosing it in single quotes
In addition, the only characters that will be ‘escaped’ when using the single quote, is the backslash (\) and also the quote itself.
The others will be represented as the letter itself, for example: \n, which should skip a line
See an example:
echo 'Testing simple quotes \' also a slash \\ , test with \n';
This code will return this result:
Testing simple quotes ' also a slash \ , test with \n
Double Quotes
In double quotes the situation changes regarding escaped characters, we can check a list in the documentation itself
But as examples: the \n to skip a line or the \t to a tab in the string, will be interpreted
In addition to of course the backslash and also the single quote itself, which does not need to be escaped in the middle of a string of double quotes
See an example:
echo "Testing simple quotes '' also a slash \\ , test with \n also the \t .";
We will then have the following output:
echo "Testing simple quotes ' also a slash , test with also the .";
See that the characters are actually escaped, and interpreted as functions and not characters
In addition, there is the possibility of interpreted variables, see an example:
$world = 'World'; echo "Hello $world!";
Check out the return:
Hello World!
Interpreted variable technique is not possible on single-quoted strings
And besides, calling methods and properties in the middle of a string, see an example:
echo "Meu nome é {$object->getName()}";
You will need to use curly braces { }, around properties and methods
Conclusion
In this article we learned the difference between single and double quotes in PHP
Which are actually several, right?
Double quotes prove to be much more versatile, with the interpretation of variables as well as special characters that can be escaped for additional functionality
The single quote can only escape the quote itself and also the backslash
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