How do I remove text URLs from the document content?

How do I remove text URLs from the document content? How does php remove text URLs from the document content? It is not a hyperlink, but text, and the URL of the URL is not fixed.

Reply to discussion (solution)

Match the regular expression first, and then delete it.
You can directly use preg_repalce ("rule", ''); replacing it with null is equivalent to deleting it.

It is not easy to understand. it is best to give an example.

Write a regular rule that matches different URLs. replace the regular rule. The key is to give an example.

Use regular expressions to filter the data and the data is cleared.