Incorrect behavior of OrdSingleByteRector (adds [0] on single char strings)

[lolistream]

Bug Report

Subject	Details
Rector version	last dev-main
Installed as	composer dependency

Minimal PHP Code Causing Issue

See https://getrector.com/demo/cc8fcae9-66be-4785-a6bf-4aa2f484b5c6

<?php

final class DemoFile
{
    public function run(bool $param)
    {
        return ord('0');
    }
}

Responsible rules

• OrdSingleByteRector

Expected Behavior

'0' should stay '0', not '0'[0]

[lolistream]

I'm not sure if rector is capable of doing that, but results of str_split aren't considered as 1 byte strings

<?php

final class DemoFile
{
    public function run(bool $param)
    {
        $split = str_split("testing");
        $res = 0;
        foreach ($split as $char) {
        	$res += ord($char);
        } 
        return $res;
    }
}

https://getrector.com/demo/f016ca76-4c75-4c39-932f-9992fb42b87e

But I'm not considering this as critical bug, just reporting if possible to fix