Okay, i learn binary how each 8 digit section worked out blah blah added up and then with the total u can use it to get a ACSii character form the table...

But how can i do all this with a converter?

and where would i get a FULL acsll table from?

i think i could understand that i would take the inputted binary string split it into 8 digit segments and then split that into 8 and if the first one is one add 128 to the total and so on to get the total for that char

and then compare this to a table...

But firstly how do i split a string every X chars so i can create a array with each 8 digit binary part so i can then make my loop to go through de-coding it...

So you want to convert a binary representation of a string to text.

So in ASCII table 010100000100100001010000 represents the string 'PHP' .

PHP Code:

 // convert a binary representation of a string back into it's original form.
function bin2asc($binaryInput, $byteLength=8)
{
    if (strlen($binaryInput) % $byteLength)
    {
        return false;
    }
    
    // why run strlen() so many times in a loop? Use of constants = speed increase.
    $strSize = strlen($binaryInput);
    $origStr = '';

    // jump between bytes.
    for($x=0; $x<$strSize; $x += $byteLength)
    {
        // extract character's binary code
        $charBinary = substr($binaryInput, $x, $byteLength);
        $origStr .= chr(bindec($charBinary)); // conversion to ASCII.
    }
    return $origStr;
}



$bin = "010100000100100001010000"; // binary of 'PHP'
$ascOut = bin2asc($bin);
echo $ascOut; // echos word 'PHP' 


http://www.phpfreaks.com/quickcode/code/244.php

can you explain what this bits doing?

ive never had to use the for() loop before dont really get it :s

Thanks, (TP on way )

First statement checks the length of binary string. If not divisible by 8 then string will be invalid and terminates.

First iteration of for loop evaluates first 8 characters and converts binary string into decimal equivalent (bindec).Chr then returns the ASCII of this decimal and adds to $origStr.

The for loop then repeats until end of binary string is reached. $origStr is returned and echoed as ASCII character string.

okay what i ment in particular was this:

PHP Code:

for($x=0; $x<$strSize; $x += $byteLength) 


</SPAN>

what i ment was what makes that bit work?

For loop will execute nested statement providing the second condition $x<$strSize evaluates to true.

Basically sets a counter , tests the value of counter and then adds a value to counter.

So in above example string length is 24
First iteration: $x is initialised and set at 0; $x is tested (0 is less than 24) and evaluates to true. It then adds 8 to counter $x and executes nested statement once.

Second iteration : $x is now set to 8; is tested and evaluates to true and executes. And so on

Result is that loop executes 3 times.

http://uk.php.net/for

o i see so basically thats the bit which makes it convert the binary for each 8 digits

Just a thing, how could i have it so IF the string isnt / by 8 (and is there-fore corrupt) to try and do it by removing whatever extra digits are on the end until it is / by 8?


Dan