How can the interpretation of variables and escape characters differ between single and double quotes in PHP?

When using double quotes in PHP, variables will be interpreted and replaced with their values, while escape characters like \n or \t will be processed. On the other hand, when using single quotes, variables will not be interpreted and escape characters will be treated as literal characters. To ensure proper interpretation of variables and escape characters, use double quotes when you want PHP to replace variables and process escape characters. Example: 

$name = "Alice";
echo "Hello, $name!\n"; // Output: Hello, Alice! (with a newline)

// To achieve the same result with single quotes, concatenate the variable and escape character as separate strings
echo 'Hello, ' . $name . "!\n"; // Output: Hello, Alice!\n (with literal \n)

Keywords

variables escape characters single quotes double quotes interpretation

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