topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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server-php-micro-captcha-securityCode.php / php



  <?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;
  
  ?>
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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