If you want to use hebrevc with english,
just use strrev.
(PHP 4, PHP 5, PHP 7)
hebrevc — Convert logical Hebrew text to visual text with newline conversion
$max_chars_per_line= 0 ] )
This function is similar to hebrev() with the difference that it converts newlines (\n) to "<br>\n".
The function tries to avoid breaking words.
A Hebrew input string.
This optional parameter indicates maximum number of characters per line that will be returned.
Returns the visual string.
Beware of English use!
I was working on a little project, and used hebrevc to reverse Hebrew in a loop. The hebrevc function got a variable as an argument. Sometimes the variable was pure English and sometimes it was hebrew.
Suddenly I found out that the English too was cut with BR tags, which made it look funny - the last line was the first.
If you're going to use that function in mixed text, don't forget to check the language before using the function.