PHPJunkyard support forum

How can I protecrt my Message Board from spammers?

Is the 5 digits capcha sufficient?

The one in your site:

http://www.phpjunkyard.com/mboard/mboard.php

Seems not be atqacked by spammers.

How can I protect my message board?

Sincerely,

Carlos

The mboard is indeed due to an update, but as a temporary solution you can try this trick:

1. open file "secimg.inc.php" in Notepad
2. Change this code to 3. save, upload to the server and test

Sure, but what this will do?
Change the capcha color to red?

Exactly - I know that sounds too simple, but it seems to do the trick for now, because the spam bots have learned to read black text on white background.

And if we can make it a random color?

$RGB1 = rand (1,255);
$text_color = imagecolorallocate($im, $RGB1, 0, 0);


$RGB1 = rand (1,255);
will generate a random number between 1 and 255, this exlcude black, because it will exclude "0" from the random variable. It will return a red color or other similar to it.

Maybe this other, can generate a color RGB for captcha:

$RGB1 = rand (1,255);
$RGB3 = rand (1,255);
$RGB3 = rand (1,255);
$text_color = imagecolorallocate($im, $RGB1, $RGB2, $RGB3);


What do you think about?

Sure, but you may want to limit the upper value to say 125 instead of 255 or you might get very light text on white background ( = hard to read).