动态SVG图像生成问题 [英] Problem with dynamic SVG image generation
问题描述
我正在尝试编写一个服务器端脚本（PHP），用于根据用户输入生成SVG图像。我使用以下代码：
<？php
echo'<？xml version =1.0standalone =no？>
<！DOCTYPE svg PUBLIC - // W3C // DTD SVG 1.1 // EN
http://www.w3.org/Graphics/SVG/1.1/DTD /svg11.dtd\">
< head>< meta http-equiv =Content-Typecontent =svg + xml/>< / head>
< svg width =100％height =100％version =1.1xmlns =http://www.w3.org/2000/svg>
< / svg>';
？>
我在某处读取MIME类型必须是svg + xml，所以我尝试将它设置为content-type就像你上面看到的那样。 Firefox正在接收正确的代码，但图像未呈现。根据维基百科上的SVG页面，SVG应该作为 image / svg + xml 。
另请参阅： 1.2 SVG MIME类型，文件扩展名和Macintosh文件类型
以下meta：
< meta http-equiv =Content-Typecontent =svg / xml/>
没有定义从服务器提供内容的方式 - 这更像是一种方式为HTML页面提供这些信息，当你无法定义它的服务方式时...
而且，我不确定meta元素是否在 SVG规范 - 我会让你检查^^
在这里，您需要做的是从您的服务器发送一个HTTP标头，指明您的数据的内容类型。
使用PHP header 函数;在你的情况下：
header（'Content-type：image / svg + xml'）;
echo'<？xml version =1.0standalone =no？>
<！DOCTYPE svg PUBLIC - // W3C // DTD SVG 1.1 // EN
http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd >
< svg width =100％height =100％version =1.1xmlns =http://www.w3.org/2000/svg>
注意：
< meta> 和< head> 标签;不知道是否应该删除< head> ，但是，因为它是空的。
头函数
希望这有助于您！
I am trying to write a server side script (PHP) for generating an SVG image based on user input. I am using the following code:
<?php
echo '<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<head><meta http-equiv="Content-Type" content="svg+xml" /></head>
<svg width="100%" height="100%" version="1.1" xmlns="http://www.w3.org/2000/svg">
<circle cx="100" cy="50" r="40" stroke="black" stroke-width="2" fill="red"/>
</svg>';
?>
I read somewhere that the MIME type must be svg+xml so I tried setting it in content-type as you can see above. The correct code is being received by Firefox but the image is not being rendered. Does somebody know what to change here?
According to the SVG page on wikipedia, SVG should be served as image/svg+xml.
See also : 1.2 SVG MIME type, file name extension and Macintosh file type
The following meta :
<meta http-equiv="Content-Type" content="svg/xml" />
Doesn't define the way a content is served from a server -- it's more of a way to give that information, for HTML pages, when you can't define the way it's served...
And, I am not sure if the meta element is valid in the SVG specifications -- I'll let you check that ^^
What you need to do, here, is send a HTTP header from your server, indicating the content-type of your data.
This is done using the PHP header function ; in your case :
header('Content-type: image/svg+xml');
echo '<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="100%" height="100%" version="1.1" xmlns="http://www.w3.org/2000/svg">
<circle cx="100" cy="50" r="40" stroke="black" stroke-width="2" fill="red"/>
</svg>';
Note :
- I have removed the
<meta>and<head>tags ; not sure if the<head>should be removed, but, as it was empty.... - I've added the call to the
headerfunction - The SVG red circle is properly displayed by firefox -- so, seems to work ;-)
Hope this helps !
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