my input is following
1 blah blah blah @username_. sblah sblah sblah
the output I need is following username_.
for now, I make this expression
^.*\@([a-zA-Z0-9\.\_]+)$
which working in following
1 blah blah blah @username_.
but if I use it for the full line it's not working
so its get the user and delete before the user but how I can make it delete the rest once it gets the user
Note I use regex101 for testing if you have a better tool please write it below.
Your pattern uses ^$ which means it needs a full match, your pattern is only partial.
By adding a .* it becomes a full regex and it matches as expected.
"/^.*\@([a-zA-Z0-9\.\_]+).*$/"
Another way to do it is to use a partial regex like this.
It skips anything up to the @ and then captures all to a dot
$str = "1 blah blah blah @username_. sblah sblah sblah";
preg_match("/.*?\@(.*?\.)/", $str, $match);
var_dump($match);