How to convert PascalCase to pascal_case?

Question

If I had:

$string = \"PascalCase\";

I need

\"pascal_case\"

Does PHP offer a function for this purpose?

Answer 1

The Symfony Serializer Component has a CamelCaseToSnakeCaseNameConverter that has two methods normalize() and denormalize(). These can be used as follows:

$nameConverter = new CamelCaseToSnakeCaseNameConverter();

echo $nameConverter->normalize('camelCase');
// outputs: camel_case

echo $nameConverter->denormalize('snake_case');
// outputs: snakeCase