String or Char -> Binary Representation

[sliminem]

Hi guys,

Is there a function to convert a String to its binary representation. Also maybe convert a char to binary.

Thank you.

[VonBestLeich]

You didn't mention what programming language you're using, so I will assume it's C++. You can find a good way to do that in the following link:-
http://www.cplusplus.com/forum/general/1764/

Let me know if that's not what you are looking for.

[sliminem]

I am so sorry...
I totally forgot that
I am interested in PHP and JAVA

thanks

[VonBestLeich]

Ah okay.

I don't know much about PHP, But in java you can start by converting the character to an Integer then use the Integer.toBinaryString(i); function to get the binary of the value of the integer like that:-

char ch='m';
int chValue=(int)ch;
String Binary=Integer.toBinaryString(chValue);

If the pure binary value is what you're looking for, you can use the getBytes function in the string you wish to convert to binary.

I hope that's useful.

[Rukbat]

Are you going to do this server-side(PHP) or client-side (Javascript)? (BTW, Java and Javascript are totally different languages.) You can't do Javascript server-side and you can't do PHP client-side, so you first have to determine where the code is going to be running. "PHP or Javascript" just doesn't work - where the code runs determines which language it has to be.

[sliminem]

Thanks guys,

Yes I know that Java and JavaScript are different and JS is client-side.
I need the JAVA for a mobile application and the PHP for my website...

[Dan Williamson]

Regular expressions and base convert can do this. A quick Google came up with various examples,

PHP Code:

$string = "string1string2string3";
$string = preg_replace ('/(\d+)/e', 'base_convert (\\1, 10, 2)', $string);

echo $string; 


Source - Hotscripts Forums.

[JohnnyS]

there's a great custom function in the php notes, it might be useful to you...
http://www.php.net/manual/en/ref.strings.php#59622

PHP Code:

<?php
/**
 *    Returns an ASCII string containing 
 *    the binary representation of the input data .
**/
function str2bin($str, $mode=0) {
    $out = false;
    for($a=0; $a < strlen($str); $a++) {
        $dec = ord(substr($str,$a,1));
        $bin = '';
        for($i=7; $i>=0; $i--) {
            if ( $dec >= pow(2, $i) ) {
                $bin .= "1";
                $dec -= pow(2, $i);
            } else {
                $bin .= "0";
            }
        }
        /* Default-mode */
        if ( $mode == 0 ) $out .= $bin;
        /* Human-mode (easy to read) */
        if ( $mode == 1 ) $out .= $bin . " ";
        /* Array-mode (easy to use) */
        if ( $mode == 2 ) $out[$a] = $bin;
    }
    return $out;
}
?>