Strings that happen to be a php function are reported as a callable

[mfb]

How do you use Sentry?

Sentry SaaS (sentry.io)

SDK version

4.7.0

Steps to reproduce

If a function calling argument is an array containing various strings, any strings that happen to be a php function will be reported as a callable.

For example this array: ['scope' => 'header', 'type' => 'file'] will be reported as:

{
  scope: Callable void header [string header; bool [replace]; int [response_code]],
  type: Callable file [string filename; int [flags]; mixed|null [context]]
}

because header() and file() happen to be functions.

My 2 cents is that is_callable() should not be called on strings, they can be reported simply as strings.

Expected result

{
  scope: header,
  type: file
}

Actual result

{
  scope: Callable void header [string header; bool [replace]; int [response_code]],
  type: Callable file [string filename; int [flags]; mixed|null [context]]
}