问题描述
我想用PHP获取SVG标签内容.
I would like to get SVG tag content with PHP.
test.svg:
<?xml version="1.0" encoding="utf-8"?>
<!-- comment -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="202.5px" height="226.084px" viewBox="0 0 202.5 226.084" enable-background="new 0 0 202.5 226.084" xml:space="preserve">
<g>
<path d="M0,13.628c47.7940,13.628z"/>
<polygon points="108.48,207.874 145.506,196.948 145.506,204.536 108.48,214.854 "/>
<path fill="none" stroke="#000000" d="M114.55,223.959"/>
</g>
<g>
<path fill="none" stroke="#000000" d="M114.55,223.959"/>
</g>
<anythingElse>
<path fill="none" stroke="#000000" d="M114.55,223.959"/>
<anythingElse>
</svg>
php:
$svg = new SimpleXMLElement( file_get_contents( 'test.svg' ) );
$svg->registerXPathNamespace('svg', 'http://www.w3.org/2000/svg');
$svg->registerXPathNamespace('xlink', 'http://www.w3.org/1999/xlink');
现在，我想以字符串的形式获取svg标签的内容.
Now, I would like to get the svg tag content as a string.
所需结果(硬编码示例):
Desired result (hardcoded example):
$content = '<g>
<path d="M0,13.628c47.7940,13.628z"/>
<polygon points="108.48,207.874 145.506,196.948 145.506,204.536 108.48,214.854 "/>
<path fill="none" stroke="#000000" d="M114.55,223.959"/>
</g>
<g>
<path fill="none" stroke="#000000" d="M114.55,223.959"/>
</g>
<anythingElse>
<path fill="none" stroke="#000000" d="M114.55,223.959"/>
<anythingElse> ';
//
我不想查找g标签:"/svg:svg/svg:g".由于不能保证svg内会有g标签.可能会有一个以上的g标签或其他一些标签.
I don't want to look for g tag: '/svg:svg/svg:g'.As there is no guarantee that inside the svg there will be a g tag. There could be more then one g tag or some other tags.
我想获得svg标记之间的所有内容.
I want to get everything between the opening and closing svg tags.
推荐答案
您已经看对了(更有可能:从)，您需要在此处为xpath注册XML名称空间，因为XML中没有前缀:
You have already seen right (more likely: copy and pasted from an example code that has been given to you in a previous answer w/o understanding it further) that you need to register the XML namespace here for your xpath because there is no prefix for it in the XML:
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="202.5px" height="226.084px" viewBox="0 0 202.5 226.084" enable-background="new 0 0 202.5 226.084" xml:space="preserve">
它只是URI http://www.w3.org/2000/svg，没有给出前缀.它是该<svg>根元素的 the 命名空间.
It is just the URI http://www.w3.org/2000/svg, no prefix given. It is the namespace of that <svg> root element.
因此，您需要注册前缀(另一个已经加前缀的名称空间应该已经自动注册):
Therefore you need to register the prefix (the other already prefixed namespace should be already registered automatically):
$svg->registerXPathNamespace('svg', 'http://www.w3.org/2000/svg');
到目前为止，您要做什么?
Which is what you do so far.
现在要在xpath查询中使用您注册的前缀，请在标记名前添加前缀:
To now use your registered prefix in the xpath query, prefix the tagname with it:
/svg:svg/svg:g[1]
应为您提供该SVG名称空间中的第一个<g>元素.让我知道是否仍然需要进一步的解释/澄清.
Should give you the first <g> element in that SVG-Namespace. Let me know if this still needs further explanation / clarification.
请参见在线演示.
这也正是您上一个问题的原因概述:
This is also exactly as the reason outline to your previous question:
这篇关于如何使用PHP获取SVG标签内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！