Get numbers that immediately follow @ symbol in string

Question

Imagine I have a textarea with the following value.

@3115
Hello this is a test post.

@115
Test quote

I'm trying to find a way in PHP using regex that will get the numeric value that comes after the '@' symbol even if there's multiple symbols.

I imagine storing the values that are returned from the regex into an array is what I'm looking for.

Answer 1

(Using a preg_match_all function as an example, but the function doesn't matter, the Regex within does:)

  $inputString = "@3115
        Hello this is a test post.
        @115
       Test quote";
  preg_match_all("/@(\d+)/",$inputString,$output);
  //$output[1] = "3115";      
  //$output[2] = "115";

This will find a @ character, and then find \d which is any numerical value, and then + means to catch [the numerical value] one or more times. the () makes this a capture group so will only return the number found and not the @ preceeding it.