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  1. <?php
  2. $string = 'this-is_a-test';
  3.  
  4. function toUpper($matches) {
  5.   return strtoupper($matches[1]);
  6. }
  7.  
  8. echo preg_replace_callback('/[-_](.)/', 'toUpper', $string);  
  9. ?>
Success #stdin #stdout 0.02s 13064KB
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thisIsATest
https://ideone.com/4Iq5T
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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