How can I find a string in a text file using php?please help

Question

(site.com/posts/gXay7MZc)
For example, I want to find "/posts/" in a text file, and print the next word of it. In this case, its gXay7MZc.

Answer 1

https://code.sololearn.com/wi57XT5wwWPt/?ref=app

Encontré este ejemplo, espero te dé una mano.