It seems like substr($char, 0, 1) can also be of type false; however, parameter $string of ord() does only seem to accept string, maybe add an additional type check?
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Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation
The call to Linna\Filter\Rules\Escape::ordutf8() has too many arguments starting with $key.
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation
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/** @scrutinizer ignore-call */
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$ord = $this->ordutf8($char, $key);
This check compares calls to functions or methods with their respective definitions.
If the call has more arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the
check may pick up the wrong definition and report false positives. One codebase
where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.