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  1. <?php
  2.  
  3. $re = '~\$[^$]+\$~'; 
  4. $str = "\$ words words \$ \$ words words \$ \$ words words \$ \$ words words \$"; 
  5. $result = preg_replace_callback($re, function($m) {
  6. 	return str_replace(" ", "-", $m[0]);
  7. }, $str);
  8. echo $result;
Success #stdin #stdout 0.03s 52472KB
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Standard input is empty
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$-words-words-$ $-words-words-$ $-words-words-$ $-words-words-$
https://ideone.com/Ji1pth
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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