fork download 
  1. <?php
  2.  
  3. $text = "a b c";
  4. $replacement = array("a b(?! c\b)" => "ab","b c" => "bc");
  5. $search = array_map(function($v){
  6.     return preg_quote($v, "/");
  7. }, array_keys($replacement));
  8.  
  9. echo $text = preg_replace_callback("/\b(" . implode("|", $search) . ")\b/", function($m)use($replacement){
  10.     return $replacement[$m[1]];
  11. }, $text);
Success #stdin #stdout 0.04s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
a bc
https://ideone.com/SIA8ES
language:
PHP (php 7.3.5)
created:
10 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!