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  1. <?php
  2.  
  3. $rulz="test closingdear [[12]]"; 
  4. preg_match_all("/\[\[(\d+)\]\]/", $rulz, $matches); 
  5. var_dump($matches[1]);
  6. ?>
Success #stdin #stdout 0.02s 13112KB
comments (?)
stdin 
Standard input is empty
stdout 
array(1) {
  [0]=>
  string(2) "12"
}
https://ideone.com/IbHhI
language:
PHP (php 7.3.5)
created:
13 years ago
visibility:
public

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