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  1. <?php
  2.  
  3. $wordToMatch = "-abc";
  4. $re = "/(?<!\\w)" . $wordToMatch . "(?!\\w)/"; 
  5. $str = "abc-abc -abc"; 
  6. $subst = "!$0!"; 
  7. $result = preg_replace($re, $subst, $str);
  8. echo $result;
Success #stdin #stdout 0.02s 52472KB
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stdin
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Standard input is empty
stdout
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abc-abc !-abc!
https://ideone.com/hOIy5i
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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