Dodit Suprianto

<br />
<?php<br />
/**<br />
* @author Dodit Suprianto<br />
* Email: d0dit@yahoo.com<br />
* Website: http://doditsuprianto.com, http://goiklan.co.nr<br />
* Website: http://www.meozit.com, http://easyads.co.nr<br />
*<br />
* call captcha code <img src=captcha.class.php?length=&font=&size=&angel=&file=><br />
*<br />
* You can enter the parameter or not. Explaination:<br />
*<br />
* length : how much character will be shown. 4 character by default.<br />
* font : Type of font (ex. Arial.ttf). Georgia font by default<br />
* size : Size of font character. 20 by default<br />
* angel : angel of font character. 0 by default, it means horizontal position<br />
* file : if you want subtitute the background image. "eyes.gif" by default.<br />
*<br />
* You must copy several file to current directory<br />
* if you want to subtitute the default setting.<br />
* such as font file, background file<br />
*<br />
*/</p>
<p>session_start();</p>
<p>class captcha<br />
{<br />
private $length;<br />
private $font;<br />
private $size;<br />
private $angel;<br />
private $file;</p>
<p>public function __construct()<br />
{<br />
$this->length = 4;<br />
$this->font = "georgia.ttf";<br />
$this->size = 20;<br />
$this->angel = 0;<br />
$this->file = "eyes.gif";<br />
}</p>
<p>public function setFile($file)<br />
{<br />
$this->file = $file;<br />
}</p>
<p>public function setLength($length)<br />
{<br />
$this->length = $length;<br />
}</p>
<p>public function setFont($font)<br />
{<br />
$this->font = $font;<br />
}</p>
<p>public function setSize($size)<br />
{<br />
$this->size = $size;<br />
}</p>
<p>public function setAngel($angel)<br />
{<br />
$this->angel = $angel;<br />
}</p>
<p>private function RandomText()<br />
{<br />
$output = "";<br />
$input = array('A','B','C','D','E','F','G','H','I','J','K','L',<br />
'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','1','2',<br />
'3','4','5','6','7','8','9');<br />
srand((float) microtime() * 10000000);<br />
$rand_keys = array_rand($input, count($input)); </p>
<p>for ($i=0; $i < count($input)-1; $i++)<br />
{<br />
$output .= $input[$rand_keys[$i]];<br />
}<br />
return substr($output, 0, $this->length);<br />
}</p>
<p>public function ConvertFontToImage()<br />
{<br />
$type = getimagesize($this->file);<br />
$random = $this->RandomText();<br />
switch ($type[2])<br />
{<br />
case IMAGETYPE_GIF:<br />
header("Content-type: image/gif");<br />
$im = imagecreatefromgif($this->file);<br />
$white = imagecolorallocate($im, 255, 255, 255);<br />
$textbox = imagettfbbox($this->size, 0, $this->font, $this->RandomText());<br />
$px = ($type[0] - $textbox[4])/2;<br />
$py = ($type[1] - $textbox[5])/2;<br />
imagettftext($im, $this->size, $this->angel, $px, $py, $white, $this->font, $random);<br />
imagegif($im);<br />
imagedestroy($im);<br />
break;<br />
case IMAGETYPE_JPEG:<br />
header("Content-type: image/jpeg");<br />
$im = imagecreatefromjpeg($this->file);<br />
$white = imagecolorallocate($im, 255, 255, 255);<br />
$textbox = imagettfbbox($this->size, 0, $this->font, $this->RandomText());<br />
$px = ($type[0] - $textbox[4])/2;<br />
$py = ($type[1] - $textbox[5])/2;<br />
imagettftext($im, $this->size, $this->angel, $px, $py, $white, $this->font, $random);<br />
imagejpeg($im);<br />
imagedestroy($im);<br />
break;<br />
case IMAGETYPE_PNG:<br />
header("Content-type: image/png");<br />
$im = imagecreatefrompng($this->file);<br />
$white = imagecolorallocate($im, 255, 255, 255);<br />
$textbox = imagettfbbox($this->size, 0, $this->font, $this->RandomText());<br />
$px = ($type[0] - $textbox[4])/2;<br />
$py = ($type[1] - $textbox[5])/2;<br />
imagettftext($im, $this->size, $this->angel, $px, $py, $white, $this->font, $random);<br />
imagepng($im);<br />
imagedestroy($im);<br />
break;<br />
}<br />
$_SESSION['code'] = $random;<br />
}<br />
} </p>
<p>$handle = new captcha();<br />
if (!empty($_GET['length'])) $handle->setLength($_GET['length']);<br />
if (!empty($_GET['font'])) $handle->setFont($_GET['font']);<br />
if (!empty($_GET['size'])) $handle->setSize($_GET['size']);<br />
if (!empty($_GET['angel'])) $handle->setAngel($_GET['angel']);<br />
if (!empty($_GET['file'])) $handle->setFile($_GET['file']);<br />
$handle->ConvertFontToImage();<br />
?><br />

<br />
<?php<br />
/**<br />
* @author Dodit Suprianto<br />
* Email: d0dit@yahoo.com<br />
* Website: http://doditsuprianto.com, http://goiklan.co.nr<br />
* Website: http://www.meozit.com, http://easyads.co.nr<br />
*<br />
* call captcha code <img src=captcha.class.php?length=&font=&size=&angel=&file=><br />
*<br />
* You can enter the parameter or not. Explaination:<br />
*<br />
* length : how much character will be shown. 4 character by default.<br />
* font : Type of font (ex. Arial.ttf). Georgia font by default<br />
* size : Size of font character. 20 by default<br />
* angel : angel of font character. 0 by default, it means horizontal position<br />
* file : if you want subtitute the background image. "eyes.gif" by default.<br />
*<br />
* You must copy several file to current directory<br />
* if you want to subtitute the default setting.<br />
* such as font file, background file<br />
*<br />
*/<br />
session_start();<br />
?><br />
<html><br />
<head></p>
<p></head><br />
<body><br />
<?php<br />
if ($_POST['submit'])<br />
{<br />
if ($_SESSION['code'] == $_POST['code'] && !empty($_SESSION['code']))<br />
{<br />
/**<br />
* you should add other codes in here<br />
* in this section, means that the captcha and code are match<br />
*/</p>
<p>echo "captcha is correct";<br />
unset($_SESSION['code']);<br />
}<br />
else<br />
{<br />
echo "captcha is wrong";<br />
}<br />
}<br />
echo "<br />
<form action='$_SERVER[SELF]' method=POST>";<br />
echo "Security code: <img src=captcha.class.php?length=4&font=&size=24&angel=5&file=>
<p>";<br />
echo "Input code:<br />
<input type=text name=code>";<br />
echo "<br />
<input type='submit' name='submit' value='Submit'>";<br />
echo "</form>
<p>";<br />
?><br />
</body><br />
</html><br />