php网站开发,关于‘文章列表页显示’的疑问?
一般显示文章列表的时候,就是到一个文章的数据库中取出一条条的记录,然后将标题、摘要等信息循环显示出来,现在我的问题是有的文章中有图片,有的文章没有图片,怎样将有图片的文章中的图片取出来预览呢,就像百度贴吧那样的。
一般在发表文章的时候,是先上传图片到网站目录,然后返回图片地址,提交的时候讲图片地址保存到了数据库。现在在‘文章列表页’这样的显示情况时,是通过正则来判断里面有没有图片链接,还是给当前数据表加一列表示图片数量的字段,加字段的话怎么加呢?还是用其他的方法呢?
不知道我理解得对不对,没开发过网站,完全是自己瞎看得一些源码。
回复内容:
一般显示文章列表的时候,就是到一个文章的数据库中取出一条条的记录,然后将标题、摘要等信息循环显示出来,现在我的问题是有的文章中有图片,有的文章没有图片,怎样将有图片的文章中的图片取出来预览呢,就像百度贴吧那样的。
一般在发表文章的时候,是先上传图片到网站目录,然后返回图片地址,提交的时候讲图片地址保存到了数据库。现在在‘文章列表页’这样的显示情况时,是通过正则来判断里面有没有图片链接,还是给当前数据表加一列表示图片数量的字段,加字段的话怎么加呢?还是用其他的方法呢?
不知道我理解得对不对,没开发过网站,完全是自己瞎看得一些源码。
1.你可以在存入数据库的时候设置一个feature_img
的字段用来显示,有就显示,没有就不显示撒
2.使用正则匹配出HTML中<img src="/static/imghw/default1.png" data-src="/img/bVklTz" class="lazy" alt="图片描述">
的src
<code>//@$content:string,如果是使用所见即所得文本编辑器,这个就是你的post过来的文章内容 //@matches:string preg_match_all('/<img . alt="php网站开发,关于‘文章列表页显示’的疑问?" >/i',$content,$matches); $feature_img = $matches[0]//取得图片的url,存入数据库 //echo $matches[0]; </img.></code>
图片保存到另外的字段就可以了
如果是单独上传的,可以加一个字段 ,如果是用富文本编辑器写上的话,也能配置文件是上传到哪,这时是需要放一个字段 还是放单独字段要看你嫌不嫌麻烦

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