Hi there,
 
I'm trying to calculate check digits for a payment system, using the ISO
7064 (MOD 97-10) algorithm, wich is, already translated to PHP:

$check=98-fmod(($num*100),97);

Where $num is a huge number...

Example: 90150123123400043211 should have check digit 51
In windows calculator: 98 - ( (90150123123400043211 * 100) mod 97) works OK
and I get 51 as result

In PHP I get 13...

Any problems with the number beeing this huge?
Notice that I tried to "echo number_format(90150123123400043211+1);", in
order to test some math on this number, and got "90,150,123,123,400,040,000"
wich is strange...

If possible, please reply to [EMAIL PROTECTED]

Thanks in advance.
 
Marco Almeida
Project Manager

WEBDADOS
Tecnologias de Informação

        Telef.:  +351 21 466 93 00      
Fax:     +351 21 466 42 81      
Móvel:   +351 96 324 43 44      
Email:   [EMAIL PROTECTED]      
www:     http://www.webdados.pt 
Morada:  R. 9 de Abril, 3-3A, Sala 4
2765-545 S. Pedro do Estoril    

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