How to actually work with PHP Transliterator (Romanization) in order to convert Farsi to Finglish

Question

I have tried everything but it does not seem to work. This code is suppose to work with any Latin Character:

var_dump(transliterator_transliterate('Any-Latin; Latin-ASCII; Lower()', "A æ Übérmensch på høyeste nivå! И я люблю PHP! fi"));

should output this:

// string(41) "a ae ubermensch pa hoyeste niva! i a lublu php! fi"

but even this does not work for me to convert Latin to English. To clarify, I have:

$word = "سلام";

I need this output (literally character sounds in English, or Finglish):

//salam