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

You need to /gm instead of just /m

The code should become: (this code won't work, the update one will)

$patterns[] = ['/ +$/mg', ''];

Working example here: https://regex101.com/r/z3pDre/1

Update:

The g identifier, don't work like this. We need to replace preg_match with preg_match_all

Use the regex without g, like this:

$patterns[] = ['/ +$/m', ''];