php unicode utf-16 bom processing with iconv and mb_convert

basically php iconv doesnt handle FEFF BOMs while mb_convert does !

        $fh = fopen($s, "r");
        // watch out for notepad unicode FEFF BOM
        $utf16 = fgets($fh, 1024);

        $utf8 = mb_convert_encoding($utf16,'UTF-8','UTF-16');
        echo PHP_EOL;

        $utf8 = mb_convert_encoding($utf16,'UTF-8','UTF-16LE');
        echo PHP_EOL;

        $utf8 = iconv('UTF-16LE','UTF-8',mb_substr($utf16,1,null,'UTF-16LE'));
        echo PHP_EOL;

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