Capturing port number from URL

Q

How to capture port number from URL addresses with a regular expression?

Here are URL address examples:

✍: Guest

A

URL addresses are written in this format: 

scheme://domain:port/path?query_string#fragment_id

The regular expression to capture the port number from URL addresses can be written as: with the multiple lines modifier "m" specified:

Click the button to test this regular expression here online:

2013-02-03, 2054👍, 0💬

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