function exists() does not seem to conform to the naming convention (^(?:is|has|should|may|supports)).
This check examines a number of code elements and verifies that they conform
to the given naming conventions.
You can set conventions for local variables, abstract classes, utility classes, constant, properties,
methods, parameters, interfaces, classes, exceptions and special methods.
This check compares the return type specified in the @return annotation of a function
or method doc comment with the types returned by the function and raises an issue if they
mismatch.
This check examines a number of code elements and verifies that they conform to the given naming conventions.
You can set conventions for local variables, abstract classes, utility classes, constant, properties, methods, parameters, interfaces, classes, exceptions and special methods.