我需要解析HTML并删除任何属性中的换行符。我尝试使用ism开关，但它返回所有字符串而不是元素。
以下是我正在使用的HTML：
<element type="contentlist" name="content1" template="
<div class='content-item'>
<img src='{thumb 128 128}' width='128' height='128' default='files/thumb/default.jpg' />
<div class='title'>{title}<small>{title_description}</small></div>
<div class='author'>{author}</div>
<div class='views'>{views}</div>
<div class='created_date'>{created_date %Y %B %d %A}</div>
<div class='edited_date'>{edited_date %Y %B %d %A}</div>
<div class='abstract'>{abstract 120}</div>
<div class='tags'>{tags}</div>
<div class='category'>{category}</div>
<a class='readmore' href='{link}'>{readmore}</a>
</div>" description="test html" />
<element type="video" name="VIDEO1" description="test html" folder="files/upload" file="vid" autoplay width="1024" loop="false" />
<element type="html" name="html1" description="test html" />
<element type="image" name="image2" hint="" description="" width="800" height="600" file="test2.jpg" folder="files/upload" />
<element type="text" name="text1" description="test text 1" max-length="256" max-words="50" />
<element type="slickslider" name="slider1" description="test text 1" />
<element type="list" name="list1" description="Menu" text-wrapper="span" text-class="text-center" class="xyz" ul-class="ul" li-class="li" />
<element type="gallery" name="gallery1" description="test text 1" />
我用于单行的正则表达式是：
/<element.*\/>/m