excel macro into php

Guys.. I have a problem and I was wondering if somebody with good php knowledge could help. I have this excel macro that converts number currency (mexican) into a string and I was wondering if somebody could help translating it to php... Her eis the macro, if you could help, I would really appreciate it. Thanks guys! Function CantidadEnLetra(tyCantidad As Currency) As String Dim lyCantidad As Currency, lyCentavos As Currency, lnDigito As Byte, lnPrimerDigito As Byte, lnSegundoDigito As Byte, lnTercerDigito As Byte, lcBloque As String, lnNumeroBloques As Byte, lnBloqueCero tyCantidad = Round(tyCantidad, 2) lyCantidad = Int(tyCantidad) lyCentavos = (tyCantidad - lyCantidad) * 100 laUnidades = Array("UN", "DOS", "TRES", "CUATRO", "CINCO", "SEIS", "SIETE", "OCHO", "NUEVE", "DIEZ", "ONCE", "DOCE", "TRECE", "CATORCE", "QUINCE", "DIESISEIS", "DIESISIETE", "DIESIOCHO", "DIESINUEVE", "VEINTE", "VEINTIUN", "VEINTIDOS", "VEINTITRES", "VEINTICUATRO", "VEINTICINCO", "VEINTISEIS", "VEINTISIETE", "VEINTIOCHO", "VEINTINUEVE") laDecenas = Array("DIEZ", "VEINTE", "TREINTA", "CUARENTA", "CINCUENTA", "SESENTA", "SETENTA", "OCHENTA", "NOVENTA") laCentenas = Array("CIENTO", "DOSCIENTOS", "TRESCIENTOS", "CUATROCIENTOS", "QUINIENTOS", "SEISCIENTOS", "SETECIENTOS", "OCHOCIENTOS", "NOVECIENTOS") lnNumeroBloques = 1 Do lnPrimerDigito = 0 lnSegundoDigito = 0 lnTercerDigito = 0 lcBloque = "" lnBloqueCero = 0 For i = 1 To 3 lnDigito = lyCantidad Mod 10 If lnDigito <> 0 Then Select Case i Case 1 lcBloque = " " & laUnidades(lnDigito - 1) lnPrimerDigito = lnDigito Case 2 If lnDigito <= 2 Then lcBloque = " " & laUnidades((lnDigito * 10) + lnPrimerDigito - 1) Else lcBloque = " " & laDecenas(lnDigito - 1) & IIf(lnPrimerDigito <> 0, " Y", Null) & lcBloque End If lnSegundoDigito = lnDigito Case 3 lcBloque = " " & IIf(lnDigito = 1 And lnPrimerDigito = 0 And lnSegundoDigito = 0, "CIEN", laCentenas(lnDigito - 1)) & lcBloque lnTercerDigito = lnDigito End Select Else lnBloqueCero = lnBloqueCero + 1 End If lyCantidad = Int(lyCantidad / 10) If lyCantidad = 0 Then Exit For End If Next i Select Case lnNumeroBloques Case 1 CantidadEnLetra = lcBloque Case 2 CantidadEnLetra = lcBloque & IIf(lnBloqueCero = 3, Null, " MIL") & CantidadEnLetra Case 3 CantidadEnLetra = lcBloque & IIf(lnPrimerDigito = 1 And lnSegundoDigito = 0 And lnTercerDigito = 0, " MILLON", " MILLONES") & CantidadEnLetra End Select lnNumeroBloques = lnNumeroBloques + 1 Loop Until lyCantidad = 0 CantidadEnLetra = "(" & CantidadEnLetra & IIf(tyCantidad > 1, " PESOS ", " PESO ") & Format(Str(lyCentavos), "00") & "/100 M.N. )" End Function