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  1. <?php
  2.  
  3. $re = '~(?:KEYWORD|(?!^)\G).*?\KSEARCHWORD~su'; 
  4. $str = "Lorem ipsum dolor SEARCHWORD sit amet, consectetur adipiscing elit. Fusce lacus nisl, feugiat laoreet dignissim sit amet, KEYWORD gravida vel velit. Nunc SEARCHWORD elementum risus orci, ac tristique sem fringilla SEARCHWORD eget. Morbi maximus lectus nulla, sed tempor nibh SEARCHWORD condimentum ut. Sed tincidunt cursus nibh"; 
  5. $result = preg_replace($re, "<b>SEARCHWORD</b>", $str);
  6. echo $result;
Success #stdin #stdout 0.03s 52480KB
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stdin
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Standard input is empty
stdout
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Lorem ipsum dolor SEARCHWORD sit amet, consectetur adipiscing elit. Fusce lacus nisl, feugiat laoreet dignissim sit amet, KEYWORD gravida vel velit. Nunc <b>SEARCHWORD</b> elementum risus orci, ac tristique sem fringilla <b>SEARCHWORD</b> eget. Morbi maximus lectus nulla, sed tempor nibh <b>SEARCHWORD</b> condimentum ut. Sed tincidunt cursus nibh
https://ideone.com/xiDwzF
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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