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View Full Version : Hiển thị địa chỉ IP của máy khách lên hình ảnh

Hoang_philong
04-11-09, 08:51 AM
Để làm điều này, trước tiên chúng ta cần tìm ra cái IP của trình duyệt (sử dụng biến $HTTP_SERVER_VARS["REMOTE_ADDR"]). Sau đó thì trong file php, mình vẽ một cái ảnh, dùng mấy hàm tạo ảnh để đưa cái chuỗi chứa IP kia vào là xong.

Code như sau:


<?php
header ("Content-type: image/png");
$im = @imagecreate (150, 30);
$str=$HTTP_SERVER_VARS["REMOTE_ADDR"];
$background_color = imagecolorallocate ($im, 200, 200, 200);
$text_color = imagecolorallocate ($im, 0, 14, 91);
imagefilledrectangle ($im, 0, 0, 200, 200, $background_color);
imagestring ($im, 4, 15, 8, $str, $text_color);
imagepng ($im);
?>


Lưu đoạn code trên vào file testimg.php rồi chạy thử xem.
Sau đó tạo một file html rồi chèn vào dòng mã HTML sau:
<img src ="testimg.php">

Xem nó ra cái quái gì :))
Hoang_philong
04-03-10, 10:41 PM
<?php

/**
Securimage Test Script
Version 2.0 - 11/15/2009

Upload this PHP script to your web server and call it from the browser.
The script will tell you if you meet the requirements for running Securimage.

http://www.phpcaptcha.org
*/


if (isset($_GET['testimage']) && $_GET['testimage'] == '1') {
$im = imagecreate(290, 120);
$white = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);

$red = imagecolorallocate($im, 255, 0, 0);
$blue = imagecolorallocate($im, 0, 0, 255);

imagestring($im, 5, 45, 1, 'Securimage Will Work!!', $blue);
imagestring($im, 2, 5, 2, ':) :)', $red);
imagestring($im, 2, 255, 2, '(: (:', $red);


imagestring($im, 3, 5, 25, 'Can you see the ', $black);
imagestring($im, 3, 190, 25, 'word?*', $black);
imageline($im, 114, 38, 184, 38, $black);
$ba = (function_exists('imagecolorallocatealpha') ?
@imagecolorallocatealpha($im, 0, 0, 0, 80) :
null);

if ($ba != null) {
imagestring($im, 3, 115, 25, 'underlined', $ba);
}

imagestring($im, 3, 5, 45, '*If the word "underlined" is not visible', $black);
imagestring($im, 3, 5, 60, 'Securimage will work but you will not be', $black);
imagestring($im, 3, 5, 75, 'able to use transparent text in your', $black);
imagestring($im, 3, 5, 90, 'CAPTCHA image.', $black);

imagepng($im, null, 3);
exit;
}

function print_status($supported)
{
if ($supported) {
echo "<span style=\"color: #00f\">Yes!</span>";
} else {
echo "<span style=\"color: #f00; font-weight: bold\">No</span>";
}
}

?>
<html>
<head>
<title>Securimage Test Script</title>
</head>

<body>

<h2>Securimage Test Script</h2>
<p>
This script will test your PHP installation to see if Securimage will run on your server.
</p>

<ul>
<li>
<strong>PHP Version:</strong> <?php echo phpversion(); ?>
<li>
<strong>GD Support:</strong>
<?php print_status($gd_support = extension_loaded('gd')); ?>
</li>
<?php if ($gd_support) $gd_info = gd_info(); else $gd_info = array(); ?>
<?php if ($gd_support): ?>
<li>
<strong>GD Version:</strong>
<?php echo $gd_info['GD Version']; ?>
</li>
<?php endif; ?>
<li>
<strong>TTF Support (FreeType):</strong>
<?php print_status($gd_support && $gd_info['FreeType Support']); ?>
<?php if ($gd_support && $gd_info['FreeType Support'] == false): ?>
<br />No FreeType support. Cannot use TTF fonts, but you can use GD fonts
<?php endif; ?>
</li>
<li>
<strong>imagettfbbox() function:</strong>
<?php print_status($gd_support && function_exists('imagettfbbox')); ?>
<?php if ($gd_support && !function_exists('imagettfbbox')): ?>
<br />PHP function imagettfbbox is not supported. Font spacing will be estimated.
<?php endif; ?>
<li>
<strong>JPEG Support:</strong>
<?php print_status($gd_support && $gd_info['JPG Support']); ?>
</li>
<li>
<strong>PNG Support:</strong>
<?php print_status($gd_support && $gd_info['PNG Support']); ?>
</li>
<li>
<strong>GIF Read Support:</strong>
<?php print_status($gd_support && $gd_info['GIF Read Support']); ?>
</li>
<li>
<strong>GIF Create Support:</strong>
<?php print_status($gd_support && $gd_info['GIF Create Support']); ?>
</li>

</ul>

<?php if ($gd_support): ?>
Since you can see this...<br /><br />
<img src="<?php echo $_SERVER['PHP_SELF']; ?>?testimage=1" alt="Test Image" align="bottom" />
<?php else: ?>
Based on the requirements, you do not have what it takes to run Securimage :(
<?php endif; ?>

</body>
</html>
Hoang_philong
04-03-10, 11:09 PM
<?php
$img_number = imagecreate(275,25);
$backcolor = imagecolorallocate($img_number,102,102,153);
$textcolor = imagecolorallocate($img_number,255,255,255);

imagefill($img_number,0,0,$backcolor);
$number = " Your IP is $_SERVER[REMOTE_ADDR]";

Imagestring($img_number,10,5,5,$number,$textcolor) ;

header("Content-type: image/jpeg");
imagejpeg($img_number);
?>