需求这样的。
有一个富文本编辑器,提交html,内部会有图片内容。要求把所有img标签的width都设置为100%。而img标签的属性顺序都不一样。比如:
<img src="" style="max-width:90%" / alt="求个HTML替换正则" > <img style="max-width:90%" src="" / alt="求个HTML替换正则" > <img style="max-width:90%" src="" / alt="求个HTML替换正则" > <img style="max-width:90%" src="" alt="求个HTML替换正则" >
这正则该咋写
return preg_replace_callback('/???/',function($match}{ },$html);
回复内容:
需求这样的。
有一个富文本编辑器,提交html,内部会有图片内容。要求把所有img标签的width都设置为100%。而img标签的属性顺序都不一样。比如:
<img src="" style="max-width:90%" / alt="求个HTML替换正则" > <img style="max-width:90%" src="" / alt="求个HTML替换正则" > <img style="max-width:90%" src="" / alt="求个HTML替换正则" > <img style="max-width:90%" src="" alt="求个HTML替换正则" >
这正则该咋写
return preg_replace_callback('/???/',function($match}{ },$html);
如果只是把img
的宽度设置成100%
的话,那直接样式控制就行啦~哪里用着正则呢~
如果是担心有行内的样式的话,可以给样式加!important
赞成 @YuanWing 和 @leandre 同学的答案。
btw,顺便写了个 js 版的正则,php的话应该也差不多吧。
btw2,编辑器预览和最终暂时效果还不一样。。。
<code>javascript</code><code>var html = ' <div width="100px"> <img style="max-width:90%" alt="求个HTML替换正则" ><img style="max-width:90%" alt="求个HTML替换正则" ><img style="max-width:90%" src="" alt="求个HTML替换正则" ><img src="" style="max-width:90%" alt="求个HTML替换正则" ><img style="max-width:90%" src="" alt="求个HTML替换正则" > </div> '; html.replace(/(<img alt="求个HTML替换正则" >]*?)(\s*)(width=[^\s\/\>]+)/g, function (str, m1, m2, m3) { return (m1 + m2 + 'width="100%"'); }); </code>
<code><?php $dom = new DOMDocument(); $dom->loadHTML('xxx'); $element = $dom->getElementsByTagName('img')[0]; //需要循环 $element->setAttribute('width', "100%"); $dom->saveHTML(); </code>

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