XOR not working

Anon

I have two strings:

1001101110111111011101110100
111100110000010100001111001

I am trying to preform the xor operator on it (⁾ and its not working. I am getting an output that looks like this:

Im not sure if this will show up on the forums but it looks like a bunch of rectangle blocks (i believe meaning the character doesnt have a look in the current font which is courier new) when i preform the (|) or the (&) operator it works, just not with the xor. why not? my code looks like this:

echo ($BlockA ^ $Block😎;

theslinky

You want to do an XOR on two integers right?

Do not use quotes around the two numbers.

I tried this code and I got 0:

<?php

$BlockA = "1001101110111111011101110100";
$BlockB = "111100110000010100001111001";

echo ($BlockA ^ $Block😎;

-sridhar

theslinky

Whoops! I put quotes around them! my real code is this:

<?php

$BlockA = 1001101110111111011101110100;
$BlockB = 111100110000010100001111001;

echo ($BlockA ^ $Block😎;

Anon

that doesnt work. you get 0 or 1 and not what you are supposed to get (011010001011101001111000011)... i think thats it.

this is because the binary numbers, written without quotes are converted to either a 1 or a 0, then when the xor is performed you get only one number.

Anon

$BlockA = "1001101110111111011101110100"
$BlockB = "111100110000010100001111001"

echo ($BlockA_b & $BlockB_b);
returns: 100100110000010100000111000

echo ($BlockA_b | $BlockB_b);
returns: 1111101110111111011111110110

echo ($BlockA_b ^ $BlockB_b);
returns:

theslinky

Stephen,

sorry, i have not worked with logical operators for over 3 years :-)

Anyway, here is a code that will give you your result (though not is the most ideal form)... but you can fix it :-)

<?php

$BlockA = "10100100101010100111";
$BlockB = "11010011101101011010";

$out = ($BlockA ^ $Block😎;
for($i = 0; $i < strlen($out); $i++) {
if($i != 0) {
echo " ";
}
echo bin2hex($out[$i]);
}

Basically, I used bin2hex to convert each bit of the output to a string byte and echoed it. It echoes either 00 or 01 depending on what it evaluates to.

You can take this and create a function out of it and after you run bin2hex, just remove the starting 0 and output the string.

-sridhar

Anon

great thanks alot