How does the choice of quotes affect the performance of PHP code, especially when dealing with large amounts of data?

Using single quotes ('') in PHP is more efficient than double quotes ("") because PHP does not have to parse the string for variable interpolation. When dealing with large amounts of data, using single quotes can lead to better performance as it reduces the processing overhead. To optimize PHP code performance, it is recommended to use single quotes for strings that do not require variable interpolation.

// Using single quotes for string literals
$name = 'John Doe';
$message = 'Hello, ' . $name . '!';

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