What is the difference between using single and double quotes in PHP when echoing variables?

When echoing variables in PHP, using double quotes allows for variable interpolation, meaning that the variable's value will be inserted into the string. Single quotes treat everything as a literal string, so variables will not be evaluated. If you want to echo a variable within a string, use double quotes. 

$name = "Alice";
echo "Hello, $name"; // Output: Hello, Alice

// Using single quotes will not interpolate the variable
echo 'Hello, $name'; // Output: Hello, $name

Keywords

PHP single quotes double quotes echoing variables string interpolation

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