What are the advantages and disadvantages of using single quotes vs double quotes in PHP for strings?

When working with strings in PHP, both single quotes and double quotes can be used to define string literals. The main difference between the two is that double quotes allow for variable interpolation, while single quotes do not. Double quotes also allow for escape sequences like \n and \t. However, single quotes are faster to parse and can be useful when working with strings that contain a lot of special characters. 

// Using double quotes for variable interpolation
$name = "John";
echo "Hello, $name!";

// Using single quotes for faster parsing
$greeting = 'Hello, $name!';
echo $greeting;

Keywords

single quotes double quotes strings PHP interpolation

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