| Current Path : /opt/cpanel/ea-php54/root/usr/share/pear/Text/CAPTCHA/Driver/ |
| Current File : //opt/cpanel/ea-php54/root/usr/share/pear/Text/CAPTCHA/Driver/Image.php |
<?php
/**
* Require Image_Text class for generating the text.
*
* PHP version 5
*
* @category Text
* @package Text_CAPTCHA
* @author Christian Wenz <wenz@php.net>
* @author Michael Cramer <michael@bigmichi1.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @link http://pear.php.net/package/Text_CAPTCHA
*/
require_once 'Text/CAPTCHA/Driver/Base.php';
require_once 'Image/Text.php';
/**
* Text_CAPTCHA_Driver_Image - Text_CAPTCHA driver graphical CAPTCHAs
*
* Class to create a graphical Turing test
*
* @category Text
* @package Text_CAPTCHA
* @author Christian Wenz <wenz@php.net>
* @author Michael Cramer <michael@bigmichi1.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @link http://pear.php.net/package/Text_CAPTCHA
* @todo refine the obfuscation algorithm :-)
* @todo consider removing Image_Text dependency
*/
class Text_CAPTCHA_Driver_Image extends Text_CAPTCHA_Driver_Base
{
/**
* Text_Password options.
*
* @var array
*/
private $_textPasswordOptions;
/**
* Width of CAPTCHA
*
* @var int
*/
private $_width;
/**
* Height of CAPTCHA
*
* @var int
*/
private $_height;
/**
* CAPTCHA output format
*
* @var string
*/
private $_output;
/**
* Further options (here: for Image_Text)
*
* @var array
*/
private $_imageOptions = array(
'font_size' => 24,
'font_path' => './',
'font_file' => 'COUR.TTF',
'text_color' => '#000000',
'lines_color' => '#CACACA',
'background_color' => '#555555',
'antialias' => false);
/**
* Init function
*
* Initializes the new Text_CAPTCHA_Driver_Image object and creates a GD image
*
* @param array $options CAPTCHA options
*
* @return void
*/
public function initDriver($options = array())
{
if (is_array($options)) {
if (isset($options['width']) && is_int($options['width'])) {
$this->_width = $options['width'];
} else {
$this->_width = 200;
}
if (isset($options['height']) && is_int($options['height'])) {
$this->_height = $options['height'];
} else {
$this->_height = 80;
}
if (!isset($options['phrase']) || empty($options['phrase'])) {
$phraseOptions = (isset($options['phraseOptions'])
&& is_array($options['phraseOptions']))
? $options['phraseOptions'] : array();
$this->_textPasswordOptions = $phraseOptions;
} else {
$this->setPhrase($options['phrase']);
}
if (!isset($options['output']) || empty($options['output'])) {
$this->_output = 'resource';
} else {
$this->_output = $options['output'];
}
if (isset($options['imageOptions'])
&& is_array($options['imageOptions'])
&& count($options['imageOptions']) > 0
) {
$this->_imageOptions = array_merge(
$this->_imageOptions, $options['imageOptions']
);
}
}
}
/**
* Create CAPTCHA image.
*
* This method creates a CAPTCHA image.
*
* @return void
* @throws Text_CAPTCHA_Exception when image generation with Image_Text produces
* an error
*/
public function createCAPTCHA()
{
$options['canvas'] = array(
'width' => $this->_width,
'height' => $this->_height
);
$options['width'] = $this->_width - 20;
$options['height'] = $this->_height - 20;
$options['cx'] = ceil(($this->_width) / 2 + 10);
$options['cy'] = ceil(($this->_height) / 2 + 10);
$options['angle'] = rand(0, 30) - 15;
$options['font_size'] = $this->_imageOptions['font_size'];
$options['font_path'] = $this->_imageOptions['font_path'];
$options['font_file'] = $this->_imageOptions['font_file'];
$options['color'] = array($this->_imageOptions['text_color']);
$options['background_color'] = $this->_imageOptions['background_color'];
$options['max_lines'] = 1;
$options['mode'] = 'auto';
do {
$imageText = new Image_Text($this->getPhrase(), $options);
$imageText->init();
$result = $imageText->measurize();
} while ($result === false && --$options['font_size'] > 0);
if ($result === false) {
throw new Text_CAPTCHA_Exception(
'The text provided does not fit in the image dimensions'
);
}
$imageText->render();
$image = $imageText->getImg();
if ($this->_imageOptions['antialias'] && function_exists('imageantialias')) {
imageantialias($image, true);
}
$colors = Image_Text::convertString2RGB(
$this->_imageOptions['lines_color']
);
$linesColor = imagecolorallocate(
$image, $colors['r'], $colors['g'], $colors['b']
);
//some obfuscation
for ($i = 0; $i < 3; $i++) {
$x1 = rand(0, $this->_width - 1);
$y1 = rand(0, round($this->_height / 10, 0));
$x2 = rand(0, round($this->_width / 10, 0));
$y2 = rand(0, $this->_height - 1);
imageline($image, $x1, $y1, $x2, $y2, $linesColor);
$x1 = rand(0, $this->_width - 1);
$y1 = $this->_height - rand(1, round($this->_height / 10, 0));
$x2 = $this->_width - rand(1, round($this->_width / 10, 0));
$y2 = rand(0, $this->_height - 1);
imageline($image, $x1, $y1, $x2, $y2, $linesColor);
$cx = rand(0, $this->_width - 50) + 25;
$cy = rand(0, $this->_height - 50) + 25;
$w = rand(1, 24);
imagearc($image, $cx, $cy, $w, $w, 0, 360, $linesColor);
}
if ($this->_output == 'gif' && imagetypes() & IMG_GIF) {
$this->setCaptcha($this->_getCAPTCHAAsGIF($image));
} else if (($this->_output == 'jpg' && imagetypes() & IMG_JPG)
|| ($this->_output == 'jpeg' && imagetypes() & IMG_JPEG)
) {
$this->setCaptcha($this->_getCAPTCHAAsJPEG($image));
} else if ($this->_output == 'png' && imagetypes() & IMG_PNG) {
$this->setCaptcha($this->_getCAPTCHAAsPNG($image));
} else if ($this->_output == 'resource') {
$this->setCaptcha($image);
} else {
throw new Text_CAPTCHA_Exception(
"Unknown or unsupported output type specified"
);
}
imagedestroy($image);
}
/**
* Return CAPTCHA as PNG.
*
* This method returns the CAPTCHA as PNG.
*
* @param resource $image generated image
*
* @return string image contents
*/
private function _getCAPTCHAAsPNG($image)
{
ob_start();
imagepng($image);
$data = ob_get_contents();
ob_end_clean();
return $data;
}
/**
* Return CAPTCHA as JPEG.
*
* This method returns the CAPTCHA as JPEG.
*
* @param resource $image generated image
*
* @return string image contents
*/
private function _getCAPTCHAAsJPEG($image)
{
ob_start();
imagejpeg($image);
$data = ob_get_contents();
ob_end_clean();
return $data;
}
/**
* Return CAPTCHA as GIF.
*
* This method returns the CAPTCHA as GIF.
*
* @param resource $image generated image
*
* @return string image contents
*/
private function _getCAPTCHAAsGIF($image)
{
ob_start();
imagegif($image);
$data = ob_get_contents();
ob_end_clean();
return $data;
}
/**
* Create random CAPTCHA phrase, Image edition (with size check).
*
* This method creates a random phrase, maximum 8 characters or width / 25,
* whatever is smaller.
*
* @return void
*/
public function createPhrase()
{
$len = intval(min(8, $this->_width / 25));
$options = $this->_textPasswordOptions;
$textPassword = new Text_Password();
if (!is_array($options) || count($options) === 0) {
$this->setPhrase($textPassword->create($len));
} else {
if (count($options) === 1) {
$this->setPhrase($textPassword->create($len, $options[0]));
} else {
$this->setPhrase(
$textPassword->create($len, $options[0], $options[1])
);
}
}
}
}
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