trying to create image using php coding for capcha

piyush23424 · April 1, 2010

Hi

i am trying to create image for capcha.

here is php line which is supposed to create image on registration.php

Here is the img.php file

<?php

// ---------------------------------------------------------------------------

// Image Validator by Alfred Reinold Baudisch<alfred_baudisch@hotmail.com>

// ---------------------------------------------------------------------------

// Change made by Tristan Carron <tc@idiap.ch>

// Date : 2005-03-01

// - Implement a new letters controle

// ---------------------------------------------------------------------------

// This program is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation; either version 2 of the License, or

// (at your option) any later version.

//

// This program is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with this program; if not, write to the Free Software

// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

// ---------------------------------------------------------------------------

// You must start sessions in the page you'll use the image validator!

session_start();

require_once("img_validator.php");

if(isset($_GET["words"]))

{

$letter = array("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",

"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"

) ;

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

$t = rand(0, count($words)-1);

for($i=0 ; $i<rand(5, 10); $i++)

{

$l = rand(0, count($letter)-1);

$word .= $letter[$l];

}

echo $word;

}

else

{

$word = false;

}

$img = new img_validator();

$img->generates_image($word);

?>

--------------

<--img.validation class-->

<?php

// ---------------------------------------------------------------------------

// img_validator class by Alfred Reinold Baudisch<alfred_baudisch@hotmail.com>

// ---------------------------------------------------------------------------

// Change made by Tristan Carron <tc@idiap.ch>

// Date : 2005-03-01

// - make it compatible to another externe page

// ---------------------------------------------------------------------------

// This program is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation; either version 2 of the License, or

// (at your option) any later version.

//

// This program is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with this program; if not, write to the Free Software

// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

// ---------------------------------------------------------------------------

class img_validator

{

/**

* Fonts folder

* @var string $folder

*/

var $folder;

/**

* Background images folder

* @var string $img_folder

*/

var $img_folder;

/**

* Letters limit for the given words

* @var integer $letters_limit

*/

var $letters_limit = 15;

/**

* The generated image will be JPEG or PNG?

* @var string $image_type

*/

var $image_type = "png";

/**

* Colors themes for the GD generated images. They must be in RGB.

* The array must start at index 1

*

* 0 => background image color

* 1 => background image border

* 2 => text color

* @var array $themes

*/

var $themes = array (

1 => array(array(205, 255, 204), array(0, 0, 0), array(0, 0, 0)),

2 => array(array(255, 255, 203), array(0, 0, 0), array(0, 0, 0)),

3 => array(array(102, 203, 255), array(0, 0, 0), array(0, 0, 0)),

4 => array(array(0, 0, 0), array(82, 82, 82), array(255, 255, 255)),

5 => array(array(153, 1, 0), array(0, 0, 0), array(255, 255, 255)),

);

/**

* Colors themes for the done BG images

*

* 0 => background image name

* 1 => Red, 2 => Green, 3 => Blue

* @var array $themes

*/

var $themes_bg_images = array (

1 => array("bg1.jpg", 0, 0, 0),

2 => array("bg2.jpg", 0, 0, 0),

3 => array("bg3.jpg", 0, 0, 0),

4 => array("bg4.jpg", 255, 255, 255),

5 => array("bg5.jpg", 255, 255, 204),

);

/**

* Fonts data

* 0 => font file,

* 1 => initial X position for a letter in size 14 texts

* 2 => initial X position for a letter in size 40 texts

* 3 => value to reduce of X each new letter in size 14 texts

* 4 => value to reduce of X each new letter in size 40 texts

*

* -> P.S.: The indexes 1, 2, 3 and 4 are used only when the text will be centralized

*/

var $fonts = array (

/* With this font, all letters are uppercase and the characters limit decrease

array("acmesab.ttf", 84, 62, 7.0, 18.0),*/

array("arial.ttf" , 85, 70, 5.1, 11.6),

array("verdana.ttf", 82, 67, 5.6, 13.5),

array("gothic.ttf", 84, 72, 5.1, 12.4),

array("adlibn.ttf", 84, 72, 5.5, 13.,

array("comicbd.ttf", 83, 68, 5.1, 11.5)

);

/**

* Image Width

* @var integer $_width

*/

var $_width = 180;

/**

* Image Height

* @var integer $_height

*/

var $_height = 50;

/**

* Checks if the system has GD support

*

* @param string $folder

* @param string $img_folder

* @since Fev 02, 2004

* @version Jul 25, 2004

* @access public

*/

function img_validator($folder = false, $img_folder = false)

{

// If doesn't given, uses the default fonts folder

if(!$folder)

{

$folder = "./img/fonts/";

}

// If doesn't given, uses the default background images folder

if(!$img_folder)

{

$img_folder = "./img/";

}

// Sets the background images and fonts dir

$this->folder = $folder;

$this->img_folder = $img_folder;

// Checks if the system has GD loaded on PHP

if(!function_exists("ImageCreateTrueColor")) // gd 2.*

{

if(!function_exists("ImageCreate")) // gd 1.*

{

$this->_error("You can't run this script because your PHP doesn't have GD library (1.* or 2.*) loaded.", E_USER_ERROR);

}

/**

* Encrypts a word to record the data

*

* @param string $word

* @since Fev 02, 2004

* @access private

*/

function encrypts_word($word)

{

return substr(md5($word), 1, 10);

}

/**

* Record a word in SESSION

*

* @param string $word

* @since Fev 02, 2004

* @access private

*/

function records_word($word)

{

$_SESSION["word_validator"] = base64_encode($this->encrypts_word($word));

}

/**

* Checks the recorded word with the given on

*

* @param string $word

* @since Fev 02, 2004

* @access public

*/

function checks_word($word)

{

$recorded = base64_decode($_SESSION["word_validator"]);

$given = $this->encrypts_word($word);

if(ereg($given, $recorded))

{

return true ;

}

else

{

echo "You've entered a bad word! Please, type the word identical as the image shows (case sensitive)!";

return false ;

}

/**

* Generates a random text, whether a word isn't give or

* the given word is more than the letters limit

*

* @since Jul 25, 2004

* @access private

*/

function generates_text()

{

$temp = md5(uniqid(microtime()));

$temp = hexdec($temp);

$word = substr($temp, 2, 3) . "-" . substr($temp, 6, 3);

return $word;

}

/**

* Generates the validation imagem with a given word.

* If the word isn't provide generate a random word.

*

* @param string $word

* @param boolean $use_done_images

* @param string $align

* @since Fev 02, 2004

* @version Jul 26, 2004

* @access public

*/

function generates_image($word = false, $use_done_images = false, $align = "center")

{

/**

* Didn't give a word, generates a random text

*/

if(!$word)

{

$word = $this->generates_text();

}

else

{

$word_size = strlen($word);

if($word_size > $this->letters_limit)

{

$word = $this->generates_text();

}

$this->records_word($word);

$word_size = strlen($word);

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

/**

* Chooses a random font

*/

$fnt = rand(0, count($this->fonts)-1);

$font = $this->folder . $this->fonts[$fnt][0];

/**

* Sets the X values according to the chosen alignment

*/

if($align == "center")

{

/**

* X position value for only 1 letter of the size 14 text

*/

$x_small = $this->fonts[$fnt][1];

$d_small = $this->fonts[$fnt][3];

/**

* X position value for only 1 letter of the size 40 text

*/

$x_big = $this->fonts[$fnt][2];

$d_big = $this->fonts[$fnt][4];

/**

* For each letter of the given word, decreases $d_small of the size 14 text's X position

* and decreases $d_big of the size 40 text's X position.

* Remember: if you change the size of the background image, the font and the text's size

* you must manually recalculate those numbers ($d_small and $d_big),

* so the text will be always right centered

*/

for($i = 1; $i < $word_size; $x_small -= $d_small, $i++);

for($i = 1; $i < $word_size; $x_big -= $d_big, $i++);

}

/**

* Left

*/

else

{

$x_small = 2;

$x_big = 2;

}

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

/**

* The background is already done, so, create the image handle from done BG

*/

if($use_done_images)

{

// Chooses randomly a theme

$theme = rand(1, count($this->themes_bg_images));

// Start image handle from file

$background_image = ImageCreateFromJPEG($this->img_folder . $this->themes_bg_images[$theme][0]);

// Text's colors

$R = $this->themes_bg_images[$theme][1];

$G = $this->themes_bg_images[$theme][2];

$B = $this->themes_bg_images[$theme][3];

}

/**

* GD Creates the background rectangle

*/

else

{

// Chooses randomly a theme

$theme = rand(1, count($this->themes));

// Start image handle

$background_image = imagecreatetruecolor($this->_width, $this->_height);

// Alocates the rectangle's colors

$fill = ImageColorAllocate($background_image, $this->themes[$theme][0][0], $this->themes[$theme][0][1], $this->themes[$theme][0][2]);

$border = ImageColorAllocate($background_image, $this->themes[$theme][1][0], $this->themes[$theme][1][1], $this->themes[$theme][1][2]);

// Creates the rectangle

ImageFilledRectangle($background_image, 2, 2, 177, 47, $fill);

ImageRectangle($background_image, 0, 0, 179, 49, $border);

// Text's colors

$R = $this->themes[$theme][2][0];

$G = $this->themes[$theme][2][1];

$B = $this->themes[$theme][2][2];

}

/**

* Allocate the texts' colors

*/

$transp_color = imagecolorallocatealpha($background_image, $R, $G, $B, 100);

$color = imagecolorallocate($background_image, $R, $G, $B);

/**

* Writes the word with transparency in the background

*/

imagettftext($background_image, 40, 0, $x_big, 45, $transp_color, $font, $word);

/**

* Writes the main word

*/

imagettftext($background_image, 14, 0, $x_small, 30, $color, $font, $word);

/**

* Prints header and the image

*/

if($this->image_type == "jpeg")

{

header("Content-type: image/jpeg");

imagejpeg($background_image, false, 95);

}

else

{

header("Content-type: image/png");

imagepng($background_image);

}

imagedestroy($background_image);

}

?>

please help

Deoctor · April 1, 2010

so wt is wrong.

and try using the :code_tags:

piyush23424 · April 1, 2010

it is not showing the image on the register.php, please check the code. there are two different class. one is creating the image and other validates the text entered correspond to the image.

please check, i am available on yahoo messager if you need any other information regarding this

here is my yahoo msg id : piyush138

thanks

Deoctor · April 1, 2010

try this one

<?php session_start(); ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd">
<html>
<head>
   <title>MicroCaptcha</title>
   <link href="style/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <div id="main">
      <div class="caption">CAPTCHA</div>
      <div id="icon"> </div>
<?php
   if (isset($_POST['submitBtn'])){
      $secCode = isset($_POST['secCode']) ? strtolower($_POST['secCode']) : "";
      if ($secCode == $_SESSION['securityCode']) {
         echo "<p>The result code was valid!<br/></p>";
         echo "<p><a href=\"".$_SERVER['PHP_SELF']."\">Repeat the test!</a><br/><br/></p>";
         unset($_SESSION['securityCode']);
         $result = true;
      }
      else {
         echo "<p>Sorry the security code is invalid! Please try it again!</p>";
         $result = false;
      }
   }
   
   if ((!isset($_POST['submitBtn'])) || (!$result)){
?>      
      <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" >
        <table width="400">
          <tr><td>Security code: <input class="text" name="secCode" type="text" size="10" /></td>
              <td><img src="securityCode.php" alt="security code" border="1" /></td>
          </tr>
          <tr><td colspan="2" align="center"><br/><input class="text" type="submit" name="submitBtn" value="Send" /></td></tr>
        </table>  
      </form>
<?php
   } 
?>      
    
    </div>
</body>

and use code tags when ever u paste the code..

piyush23424 · April 1, 2010

try this one

<?php session_start(); ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd">
<html>
<head>
   <title>MicroCaptcha</title>
   <link href="style/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <div id="main">
      <div class="caption">CAPTCHA</div>
      <div id="icon"> </div>
<?php
   if (isset($_POST['submitBtn'])){
      $secCode = isset($_POST['secCode']) ? strtolower($_POST['secCode']) : "";
      if ($secCode == $_SESSION['securityCode']) {
         echo "<p>The result code was valid!<br/></p>";
         echo "<p><a href=\"".$_SERVER['PHP_SELF']."\">Repeat the test!</a><br/><br/></p>";
         unset($_SESSION['securityCode']);
         $result = true;
      }
      else {
         echo "<p>Sorry the security code is invalid! Please try it again!</p>";
         $result = false;
      }
   }
   
   if ((!isset($_POST['submitBtn'])) || (!$result)){
?>      
      <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" >
        <table width="400">
          <tr><td>Security code: <input class="text" name="secCode" type="text" size="10" /></td>
              <td><img src="securityCode.php" alt="security code" border="1" /></td>
          </tr>
          <tr><td colspan="2" align="center"><br/><input class="text" type="submit" name="submitBtn" value="Send" /></td></tr>
        </table>  
      </form>
<?php
   } 
?>      
    
    </div>
</body>

and use code tags when ever u paste the code..

The above code is just printing security code image(backgroud image) not the security text.

where is the securityCode.php file... please send me zip file of all after checking it on your own system.

Thanks.

ignace · April 1, 2010

Just use recaptcha http://recaptcha.net/ It's easy & well-tested

Deoctor · April 1, 2010

oops I forgot that check this here

The above code is just printing security code image(backgroud image) not the security text.

where is the securityCode.php file... please send me zip file of all after checking it on your own system.

Thanks.

<?php
session_start();

$width  = 120;
$height =  40;
$length =   5;

$baseList = '0123456789abcdfghjkmnpqrstvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

$code    = "";
$counter = 0;

$image = @imagecreate($width, $height) or die('Cannot initialize GD!');

for( $i=0; $i<10; $i++ ) {
   imageline($image, 
         mt_rand(0,$width), mt_rand(0,$height), 
         mt_rand(0,$width), mt_rand(0,$height), 
         imagecolorallocate($image, mt_rand(150,255), mt_rand(150,255), mt_rand(150,255)));
}

for( $i=0, $x=0; $i<$length; $i++ ) {
   $actChar = substr($baseList, rand(0, strlen($baseList)-1), 1);
   $x += 10 + mt_rand(0,10);
   imagechar($image, mt_rand(3,5), $x, mt_rand(5,20), $actChar, 
      imagecolorallocate($image, mt_rand(0,155), mt_rand(0,155), mt_rand(0,155)));
   $code .= strtolower($actChar);
}
   
header('Content-Type: image/jpeg');
imagejpeg($image);
imagedestroy($image);

$_SESSION['securityCode'] = $code;

?>

piyush23424 · April 1, 2010

Thank you all for your help.... capcha is working now .....

Sign In

trying to create image using php coding for capcha

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