use regex to replace string in URL with something else

[babadoctor]

how do I use regex to replace a certain part of a string and nothing else?

 

i want youtube.com links to get auto redirected to yewtu.be links.

 

for example

https://www.youtube.com/watch?v=R7CO9v9rpOk

i want this link to redirect to

https://www.yewtu.be/watch?v=R7CO9v9rpOk

 

the only difference in the links is the domain name. How can I accomplish the replacement with regex?

 

I tried this but it didn't work

 

[trag1c]

you could probably use 

\byoutube\.com\b

This uses word boundaries so that it will match what's between the \b. The escape before the period is that it will match the period and not any character at that position. 

 

So with a string replace function you should be able to substitute the matched regex without messing with the rest of the URL.

 

https://regex101.com/