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  1. <?php
  2.  
  3. $re = '/(?:\b|\d+)([a-z])|[\d+ +!.@]/';
  4. $str = 'Th3 qu!ck br0wn f0x jumps 0v3r th3 l@zy d0g. ';
  5. $subst=strtoupper('\\1');
  6. $result = preg_replace_callback($re,function ($matches) {
  7.         return (isset($matches[1]) ? strtoupper($matches[1]) : '');
  8.     },$str);
  9. echo $result;
  10. ?>
Success #stdin #stdout 0s 82944KB
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stdin
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Standard input is empty
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ThQuCkBrWnFXJumpsVRThLZyDG
https://ideone.com/19IQLq
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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