Standard captcha - font size & color

[kr3ck3n]

Hi!

I'm using phocaguestbook on my site and I have a little "design issue". This is the website i'm talking about and as you can see I've made some changes to the form and the last thing I want to do but I don't figure out how is to set up the captcha font (size, color, family).
I managed somehow to change the maximum number of displayed characters in the captcha image by modifying the code from /helpers/phocaguestbookcaptcha.php file (line 497, class PhocaguestbookHelperCaptcha} but I don't know how to setup the font...
What I want is a font written with Rockwell font-family ( I have the ttf file if needed ), the size must be around 22px and the color #676B61. Where can I add this values ?

PS: all I want is to have a similar captcha like this one.
PS2: the font-familly doesn't really matters, i'm more interest to solve the font-size and color.
Thanks!

LE: i've changed the font-color to #676B61, but I can't change the font-size now.. this is the website and I want to look like this

[Jan]

Hi, the captcha class needs to be customized but I don't have any experiences with the style on the second site, so cannot give any clue advice there

Jan

[kr3ck3n]

This is the code for the standard captcha:

Code: Select all

class PhocaguestbookHelperCaptcha
{
   function createImageData()
   {
      $rand_char           = PhocaguestbookHelperCaptcha::generateRandomChar(4);
      $rand_char_array     = array (         $rand_char[0]."          ",
                                 "  ".$rand_char[1]."        "   ,
                               "    ".$rand_char[2]."      "   ,
                              "      ".$rand_char[3]);

      $image_name       = PhocaguestbookHelperCaptcha::getRandomImage();
      $image             = @imagecreatefromjpeg($image_name);
      
      foreach ($rand_char_array as $key => $value)
      {
         $font_color    = PhocaguestbookHelperCaptcha::getRandomFontColor();
         $position_x    = mt_rand(5,8);
         $position_y    = mt_rand(6,9);
         $font_size       = mt_rand(4,5);
         
         ImageString($image, $font_size, $position_x, $position_y, $value, ImageColorAllocate ($image, $font_color[0], $font_color[1], $font_color[2]));
      }

      $image_data['outcome']       = $rand_char;
      $image_data['image']       = $image;
      
      return $image_data;
   }
   
   function generateRandomChar($length=4)
   {   
   
      $paramsC    = JComponentHelper::getParams('com_phocaguestbook') ;
      
      $charGroup = 'a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z';
      if ($paramsC->get( 'standard_captcha_chars' ) != '') {
         $charGroup = str_replace(" ", "", trim( $paramsC->get( 'standard_captcha_chars' ) ));
      }
      $charGroup = explode( ',', $charGroup );
   
      
      srand ((double) microtime() * 1000000);
      
      $random_string = "";
      
      for($i=0;$i<$length;$i++)
      {
         $random_char_group = rand(0,sizeof($charGroup)-1);
         
         $random_string .= $charGroup[$random_char_group];
      }
      return $random_string;
   }

   function getRandomImage()
   {
      $rand = mt_rand(1,4);
      $image = '0'.$rand.'.jpg';
      $image = JPATH_ROOT.DS.'components'.DS.'com_phocaguestbook'.DS.'assets'.DS.'captcha'.DS . $image;
      return $image;
   }


   function getRandomFontColor()
   {
      $rand = mt_rand(1,6);
      if ($rand == 1) {$font_color[0] = 0; $font_color[1] = 0; $font_color[2] = 0;}
      if ($rand == 2) {$font_color[0] = 0; $font_color[1] = 0; $font_color[2] = 153;}
      if ($rand == 3) {$font_color[0] = 0; $font_color[1] = 102; $font_color[2] = 0;}
      if ($rand == 4) {$font_color[0] = 102; $font_color[1] = 51; $font_color[2] = 0;}
      if ($rand == 5) {$font_color[0] = 163; $font_color[1] = 0; $font_color[2] = 0;}
      if ($rand == 6) {$font_color[0] = 0; $font_color[1] = 82; $font_color[2] = 163;}
      return $font_color;
   }
}

I've removed the $rand_char[4] and $rand_char[5] from the function createImageData and that's how I managed to have 4 characters instead of 6 but the rest I don't know to modify.
Thanks!

[kr3ck3n]

The captcha code is the following:

Code: Select all

class PhocaguestbookHelperCaptcha
{
function createImageData()
{
  $rand_char           = PhocaguestbookHelperCaptcha::generateRandomChar(4);
  $rand_char_array     = array (         $rand_char[0]."          ",
                             "  ".$rand_char[1]."        "   ,
                           "    ".$rand_char[2]."      "   ,
                          "      ".$rand_char[3]);

  $image_name       = PhocaguestbookHelperCaptcha::getRandomImage();
  $image             = @imagecreatefromjpeg($image_name);

  foreach ($rand_char_array as $key => $value)
  {
     $font_color    = PhocaguestbookHelperCaptcha::getRandomFontColor();
     $position_x    = mt_rand(5,8);
     $position_y    = mt_rand(6,9);
     $font_size       = mt_rand(4,5);

     ImageString($image, $font_size, $position_x, $position_y, $value, ImageColorAllocate ($image, $font_color[0], $font_color[1], $font_color[2]));
  }

  $image_data['outcome']       = $rand_char;
  $image_data['image']       = $image;

  return $image_data;
}

function generateRandomChar($length=4)
{   

  $paramsC    = JComponentHelper::getParams('com_phocaguestbook') ;

  $charGroup = 'a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z';
  if ($paramsC->get( 'standard_captcha_chars' ) != '') {
     $charGroup = str_replace(" ", "", trim( $paramsC->get( 'standard_captcha_chars' ) ));
   }
  $charGroup = explode( ',', $charGroup );


  srand ((double) microtime() * 1000000);

  $random_string = "";

  for($i=0;$i<$length;$i++)
  {
     $random_char_group = rand(0,sizeof($charGroup)-1);

     $random_string .= $charGroup[$random_char_group];
  }
  return $random_string;
 }

  function getRandomImage()
{
  $rand = mt_rand(1,4);
  $image = '0'.$rand.'.jpg';
  $image = JPATH_ROOT.DS.'components'.DS.'com_phocaguestbook'.DS.'assets'.DS.'captcha'.DS . $image;
  return $image;
}


 function getRandomFontColor()
 {
  $rand = mt_rand(1,6);
  if ($rand == 1) {$font_color[0] = 0; $font_color[1] = 0; $font_color[2] = 0;}
  if ($rand == 2) {$font_color[0] = 0; $font_color[1] = 0; $font_color[2] = 153;}
  if ($rand == 3) {$font_color[0] = 0; $font_color[1] = 102; $font_color[2] = 0;}
  if ($rand == 4) {$font_color[0] = 102; $font_color[1] = 51; $font_color[2] = 0;}
  if ($rand == 5) {$font_color[0] = 163; $font_color[1] = 0; $font_color[2] = 0;}
  if ($rand == 6) {$font_color[0] = 0; $font_color[1] = 82; $font_color[2] = 163;}
  return $font_color;
  }
   }

I've removed the $rand_char[4] and $rand_char[5] from the function createImageData and that's how I managed to have 4 characters instead of 6.

COLOR - Solved! I changed this code:

Code: Select all

     function getRandomFontColor()
 {
  $rand = mt_rand(1,6);
  if ($rand == 1) {$font_color[0] = 0; $font_color[1] = 0; $font_color[2] = 0;}
  if ($rand == 2) {$font_color[0] = 0; $font_color[1] = 0; $font_color[2] = 153;}
  if ($rand == 3) {$font_color[0] = 0; $font_color[1] = 102; $font_color[2] = 0;}
  if ($rand == 4) {$font_color[0] = 102; $font_color[1] = 51; $font_color[2] = 0;}
  if ($rand == 5) {$font_color[0] = 163; $font_color[1] = 0; $font_color[2] = 0;}
  if ($rand == 6) {$font_color[0] = 0; $font_color[1] = 82; $font_color[2] = 163;}
  return $font_color;
  }

...to this one:

Code: Select all

     function getRandomFontColor()
 {
  $rand = mt_rand(1,1);
  if ($rand == 1) {$font_color[0] = 181; $font_color[1] = 181; $font_color[2] = 181;}
  return $font_color;
  }

So, the $font_color[0,1,2] where actualy the rgb code for the captcha color.

Now the only problem is with font-size. I've tried to add bigger values to this code: $font_size = mt_rand(4,5);, but no use...

[Jan]

Hi, depends if it is TTF captcha (font can be resized) or not. In standard captcha the system font of the server is used (there are only 5 sizes for it and in Phoca Guestbook Captcha the largest is used)

[kr3ck3n]

Thanks for your answer! It helped me.
I've changed the standard captcha to TTF Capctha and I've done all the changes I wanted and now it's ok.
The only inconvenient is that the space between letters is to big. Is there a way I can fix that?

Thanks!

[Jan]

Hi, this is the same like with other changes, find the place where the space is defined and change it.