正则表达式删除一切从一些标记开始和结束于其他一些标签

Question

我有一个像下面

<img alt="rlogo" src="https://something.net/logo.gif/resized_logo.png?r=3" /> 

<p> 
    <strong>Headquarters:</strong> Austin, TX 
    <br /><strong>URL:</strong> <a href="https://something.com/F402B805CC">https://something.com/j/F402B805CC</a> 
</p> 

Lorem ipsum dollar sit amet 

我想删除除“Lorem存有美元坐阿梅特”的一切，一个字符串到目前为止，我设法去除图像使用

preg_replace('<img alt=\"rlogo\".*>','',$description) 

标签但<p>标签同样不起作用，因为有后<p>标签新的生产线。

有没有办法可以去除一切从<img开始至</a></p>

Answer 1

使用s选项（点匹配换行符）;

$result = preg_replace('%<img.*?</p>%si', '', $description); 

---

正则表达式Explanantion

<img.*?</p> 

Options: Case insensitive (i); Exact spacing; Dot matches line breaks (s); ^$ don’t match at line breaks; Greedy quantifiers; Regex syntax only 

Match the character string “<img” literally (case insensitive) «<img» 
Match any single character «.*?» 
    Between zero and unlimited times, as few times as possible, expanding as needed (lazy) «*?» 
Match the character string “</p>” literally (case insensitive) «</p>»