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  1. <?php
  2.  
  3. $re = '~{{.*?}}~s'; 
  4. $str = "This is {{some.     test}} to see     if I can remove spaces"; 
  5. echo preg_replace_callback($re, function($m) {
  6. 	return str_replace(" ", "", $m[0]);
  7. }, $str);
Success #stdin #stdout 0.02s 52432KB
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This is {{some.test}} to see     if I can remove spaces
https://ideone.com/s7gR78
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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