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  1. <?php
  2.  
  3. echo preg_replace('#[a-z]*([a-z]+)\1[a-z]*#', '', 'wword ok wordd') . "\n";
  4. // =>  ok 
  5. // С поддержкой Юникода
  6. echo preg_replace('#\p{L}*(\p{L}+)\1\p{L}*#u', '', 'слослон из зоопарка');
  7. // => из 
  8.  
Success #stdin #stdout 0.02s 82944KB
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https://ideone.com/HGl7k8
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
secret

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