function image_captcha_image in CAPTCHA 6.2

Same name and namespace in other branches

1. 5.3 image_captcha/image_captcha.module \image_captcha_image()
2. 6 image_captcha/image_captcha.user.inc \image_captcha_image()
3. 7 image_captcha/image_captcha.user.inc \image_captcha_image()

Menu callback function that generates the CAPTCHA image.

1 string reference to 'image_captcha_image'

image_captcha_menu in image_captcha/image_captcha.module

Implementation of hook_menu().

File

image_captcha/image_captcha.user.inc, line 14

Functions for the generation of the CAPTCHA image.

Code

function image_captcha_image($captcha_sid = NULL) {

  // If output buffering is on: discard current content and disable further buffering
  if (ob_get_level()) {
    ob_end_clean();
  }
  if (!$captcha_sid) {
    exit;
  }

  // Get solution (the code to show).
  $code = db_result(db_query("SELECT solution FROM {captcha_sessions} WHERE csid = %d", (int) $captcha_sid));

  // Only generate captcha if code exists in the session.
  if ($code !== FALSE) {

    // generate the image
    $image = @_image_captcha_generate_image($code);

    // check of generation was successful
    if (!$image) {
      watchdog('CAPTCHA', 'Generation of image CAPTCHA failed. Check your image CAPTCHA configuration and especially the used font.', array(), WATCHDOG_ERROR);
      exit;
    }

    // Send the image resource as an image file to the client.
    $file_format = variable_get('image_captcha_file_format', IMAGE_CAPTCHA_FILE_FORMAT_JPG);
    if ($file_format == IMAGE_CAPTCHA_FILE_FORMAT_JPG) {
      drupal_set_header("Content-type: image/jpeg");
      imagejpeg($image);
    }
    else {
      drupal_set_header("Content-type: image/png");
      imagepng($image);
    }

    // Clean up the image resource.
    imagedestroy($image);
  }
  exit;
}