Steganography (Decode image)
$x )
{
$px = $px%$x;
$py += $h;
}
$rgb = imagecolorat( $img, $px, $py );
$R = ( $rgb >> 16 ) & 0x7;
$G = ( $rgb >> 8 ) & 0x7;
$B = $rgb & 0x3;
$m = $R + ( $G<<3 ) + ( $B<<6 );
$g = dechex( $G<<3 );
$b = dechex( $B<<6 );
if( $m == 0 ) break;
$message .= chr( $m );
}
?>
Result
Image with hidden text.
Decoded message :
With code :
➠ To index
➠ To Encode