首先道歉,如果问题标题误导你。这就是我想要实现的目标。
我希望网站管理员来到我的网站,复制一段代码(基本上它在网站管理员的网站上显示图像),然后将其粘贴到他们的网站上以推广我的网站。我很好,直到这一点,并成功地做到了这一点。现在,我希望图像具有从我的网站获取的动态排名。因此,当网站管理员将代码粘贴到他们的网站上时,图像上显示的排名(作为文本)会根据我的数据库设置而变化。
任何人都可以告诉我这是如何实现的。
答案 0 :(得分:3)
您可以像aniruddha建议的那样执行iframe,也可以使用javascript。有关其各种小部件如何工作的信息,请参阅Twitter,Facebook和Google日历。
我为您提供了一些非常简化的实现,以了解它们的工作原理。但是看一下上面提到的例子可能会更好。请忽略我的示例中的安全问题。只是想在最简单的层面上展示它是如何工作的。
iFrame示例
Iframe客户端代码示例:
<html>
<head>
</head>
<body>
<h1>User Website Title</h1>
<p>Some random user text</p>
<p>Iframe version here</p>
<!--This is the code that the client would paste in to their website -->
<iframe src="http:/your.domain.com/server_iframe_test.php?user=TestUser" height="30" width="500" scrolling="no" frameBorder="0"></iframe>
<!-- End client iframe code to paste-->
</body>
</html>
在您的服务器上,您可以将页面用作iFrame的来源。在这里我称之为server_iframe_test.php:
<?php
//Generating a random number to show that page will update on reload
$randomNumber = rand(1, 999);
//In the src of the iframe we will send a get parameter called user to determine which user we should look up
$data = array('user' => $_GET['user'], 'rank' => $randomNumber, 'image' => 'http://url/to/some/image.png');
?>
<!-- This is the output that will be generated in the iframe -->
<div class="widget_wrapper"><?php echo $data['user'] ?>: <?php echo $data['rank'] ?> and <? echo $data['image'] ?></div>
Javascript示例
对于javascript示例,可以使用JSONP跨域进行ajax调用。您可以在此处了解其工作原理:http://www.ibm.com/developerworks/library/wa-aj-jsonp1/
以下是javascript版本的客户端:
<html>
<head>
<!-- I'm cheating here by including jquery in the head. My test script needs it-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
</head>
<body>
<h1>User Website Title</h1>
<!--Code that user pastes into their page-->
<!--First get the script from your domain-->
<script src="http://your.domain.com/test_widget.js"></script>
<!--This code is also pasted by the client. We use this to set user name and then render the html. Also I added an id to the script tag here to know where to append the html. This is a more of a shortcut.-->
<script id="test_widget_script">
var widget = new testWidget('TestUser');
widget.render();
</script>
<!-- Widget will render html here -->
<!--End Code to Paste-->
<p>Some random user text</p>
</body>
</html>
这是名为test_widget.js
的服务器端js脚本:
var testWidget = function(user){
var _user = user;
this.render = function() {
//We make a JSONP call here to our php script which generates the data for the user. Note the &callback?. We need to add this to make it a JSONP call.
$.getJSON('http://your.domain.com/test_js.php?user=' + _user + '&callback=?', function(data){
//Append html result after the js tag with the following id
$("#test_widget_script").after('<div class="widget_wrapper">' + _user + ': ' + data.rank + ' and ' + data.image + '</div>');
});
}
}
以下是名为test_js.php
的php文件,它将处理请求:
<?php
$randomNumber = rand(1, 999);
$data = array('user' => $_GET['user'], 'rank' => $randomNumber, 'image' => 'http://url/to/some/image.png');
//We need to make the content type javascript
header("Content-type: text/javascript");
?>
<?php //Here we take the name of the callback passed as a GET parameter and use it as a function to pass in our json data. We don't call the function in php, but when the text gets returned, jQuery knows how to handle the response. ?>
<?php echo $_GET['callback'] ?>(<?php echo json_encode($data); ?>);
答案 1 :(得分:1)
我认为服务器端脚本页面的src需要iframe,它将从服务器获取具有等级的呈现代码。 iframe的目的是渲染整个html。
答案 2 :(得分:0)
从此处修改代码http://php.net/manual/en/function.imagettftext.php
制作一张你的等级的图像。这是基于该代码的测试示例,请注意您需要GD和truetype。您所需要做的就是发送一个链接并使用get变量来设置哪个用户,这样您就可以从数据库中获得正确的排名。我不会编写那部分代码。
// Create the image
$im = imagecreatetruecolor(400, 30);
// Create some colors
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 399, 29, $white);
// The text to draw (your ranking)
$text = '21'; // <== change this as you need over time
// Replace path by your own font path
$font = 'arial.ttf';
// Add some shadow to the text
imagettftext($im, 20, 0, 11, 21, $grey, $font, $text);
// Add the text
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
?>