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Title : Generate image with random number (CAPTCHA)
Categories : PHP, GD image library, Graphics, Security Click here to Update Your Picture
Ben Yacoub Hatem
Date : Jun 13th 2004
Grade : 2 of 5 (graded 11 times)
Viewed : 12725
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imgsecuregen() Generate an image with a random number, usefull for bot protection.

@param integer $size
@author Ben Yacoub Hatem <hatem@php.net>
@copyright Copyright PHP Tunisie (c) 2004
@version $Id$ - 12/06/2004 07:02:09 - securelogin.php
@access public
@return

<?php
function imgsecuregen($size = 6){
     
   
$width = 11*$size;
   
$height = 30;
     
   
$string = "";
    for(
$i = 1; $i <= $size; $i++){
       
$string .= rand (0,9)."";
    }
// for
     
   
$im = ImageCreate($width, $height);
   
$bg = imagecolorallocate($im, 255, 255, 255);
   
$black = imagecolorallocate($im, 0, 0, 0);
   
$grey = imagecolorallocate($im, 170, 170, 170);
   
imagerectangle($im,0, 0, $width-1, $height-1, $grey);   
   
imagestring($im, 5, $size, 5, $string, $black);
   
imagepng($im);
   
imagedestroy($im);
}

imgsecuregen(10);

?>




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