fork(3) download 
  1. <?php
  2.  
  3. $s = " Ł    ę  d    \r\n  Я      ёb     ";
  4. $n = preg_replace('~(*ANYCRLF)^\h+|\h+$|(\h){2,}~um', '$1', $s);
  5. echo $n;
  6.  
Success #stdin #stdout 0s 52488KB
comments (?)
stdin 
Standard input is empty
stdout 
Ł ę d
Я ёb
https://ideone.com/D6GE2s
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!