Not able to change the size of captcha in PHP

Question

I have the following captcha plug-in.

I tried changing different font-size but none of them worked.

Could anyone tell me how to change the font-size please.

Thanks in advance.

EDITED: Code Here.

Answer 1

I see two references to font size being set:

$font_size = 5;

and

$font_size  = !empty($font_size) ? $font_size : mt_rand(18,25);

Try changing both to be the size you want (I'm assuming a higher number means larger size):

$font_size = 8;

It also looks like the code adjusts the image size to accommodate font size so making the image larger may also affect font-size.

Answer 2

You may want to try to write under that:

$defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_size' => '', 'font_path' => '', 'show_grid' => true, 'skew' => true, 'expiration' => 7200);

the following line

$defaults['font_size'] = 0;

(and change the 0 to your desired size of course)

Answer 3

This captcha is garbage and this code is poorly written. You should use reCapthca, it is very good and its free.

I have the right to say that that this capthca is garbage because I break capthcas: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-2019 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-3573 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-2020 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-3573 (Or atleast in 2008 I did :)

But to actually answer your question: On line 127 the length of the challenge is being generated. Change the number 6 to whatever you want.

    for ($i = 0; $i < 6; $i++)
    {
        $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
    }