trim lines and shrink whitespaces using regex for multi line string

Question

I\'m using a php function want to create a function to trim all unnecessary white spaces from a multi line string.

The regex that it\'s not working is the one tha

Answer 1

preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )

so you want preg_replace('/[\s]+$/m', '', $string)