正則表達式刪除一切從一些標記開始和結束於其他一些標籤

Question

我有一個像下面

<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 

我想刪除除「Lorem存有美元坐阿梅特」的一切，一個字符串到目前爲止，我設法去除圖像使用

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

標籤但<p>標籤同樣不起作用，因爲有後<p>標籤新的生產線。

有沒有辦法可以去除一切從<img開始至</a></p>

Answer 1

使用s選項（點匹配換行符）;

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

---

正則表達式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>»