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  1. <?php
  2.  
  3. $s = "Hello this\nis\nme on [the\nline\nto\n] have no clue";
  4. echo preg_replace_callback('/\[\s*([^][]*?)\s*]/', function($m){
  5. 	return "[" . str_replace("\n", " ", $m[1]) . "]";	
  6. }, $s);
Success #stdin #stdout 0.02s 52472KB
comments ()
stdin 
Standard input is empty
stdout 
Hello this
is
me on [the line to] have no clue
https://ideone.com/bMTojH
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
secret

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