Question

How do I remove extra spaces at the end of a string using regex (preg_replace)?

$string = "some random text with extra spaces at the end      ";

Answer 1

There is no need of regex here and you can use rtrim for it, its cleaner and faster:

$str = rtrim($str);

But if you want a regex based solution you can use:

$str = preg_replace('/\s*$/','',$str);

The regex used is /\s*$/

• \s is short for any white space
  char, which includes space.
• * is the quantifier for zero or
  more
• $ is the end anchor

Basically we replace trailing whitespace characters with nothing (''), effectively deleting them.