It seems like $extraParams can also be of type null; however, parameter $additional_params of mail() does only seem to accept string, maybe add an additional type check?
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Ignorable by Annotation
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If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation
It seems like $headers can also be of type null; however, parameter $additional_headers of mail() does only seem to accept array|string, maybe add an additional type check?
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation