Rest of the two digit numbers i . e . , 21 to 99
else { $ i = $ num [ $ x ] - '0' ; if ( $ i > 0 ) echo $ tens_multiple [ $ i ] . " ▁ " ; else echo " " ; ++ $ x ; if ( $ num [ $ x ] - '0' != 0 ) echo $ single_digits [ $ num [ $ x ] - '0' ] . " ▁ STRNEWLINE " ; } } ++ $ x ; } }