binary arithmetic in php?

[BobMCT]

Gents;

Given two string representations of binary numbers is there any way to add them in php?

Example:

$_bin1 = "000101000101";
$_bin1 = "000000010001";

print "$_bin1 + $_bin2";

I've been researching and working on this for most of two days and cannot come up with anything concrete.

And NO, this is not homework. It's a real problem!

Thanks for any suggestions and I apologize if I missed any function that I should have caught.

B

 

[tlhawkins]

I would use the bindec and decbin functions:

$_bin1 = '000101000101';
$_bin2 = '000000010001';
$_num1 = bindec($_bin1);
$_num2 = bindec($_bin2);
echo $_bin1 . ' + ' . $_bin2 . ' = ' . decbin($_num1 + $_num2) . "<br/>";

but that's just because I have 10 fingers.

Travis Hawkins
jobs.bestcodingpractices.com

 

[jpadie]

have not given this more than a moment's thought but can't you just use a bitwise OR ?

 

[johnwm]

Bitwise OR won't generate carries.

If you want the best response to a question, please check out FAQ222-2244 first.
'If we're supposed to work in Hex, why have we only got A fingers?'
Drive a Steam Roller

 

[jpadie]

but eating too much chocolate would.

 

[tlhawkins]

same with eating too much chocolate wood

 

[johnwm]

Are you suggesting I'm a pirate (too many ARRRGHs) ?

But if you REALLY want to do it using binary logic have a google at 'half-adder'

If you want the best response to a question, please check out FAQ222-2244 first.
'If we're supposed to work in Hex, why have we only got A fingers?'
Drive a Steam Roller