Ask another regular expression about the ending $

Ask another regular expression about the ending $

Preg_match_all ("/ar $/I", "batr bar car ar asdf", $ out); print_r ($ out );

This code contains $. isn't it the word ending with r? btar bar car ar should all be output. Why is there nothing.
Isn't that true?

Reply to discussion (solution)

Is to check whether the string has ended with ar.

Preg_match_all ("/ar \ B/I", "batr bar car ar asdf", $ out );

$ Is the end of a line...

$
End of the assertion target (or end of the downlink in multiline mode, that is, before a line break)

The second floor at the end of the word you want to give you the answer. the asserted at the end of the word is \ B.