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  1. <?php
  2. $mystring = "some text for test and need to replace by regex using php.
  3. We have another sentence";
  4. $regex = '~(?s)^.*?regex\K.*~';
  5. if (preg_match($regex, $mystring, $m)) {
  6.     $yourmatch = $m[0]; 
  7.     echo $yourmatch;
  8.     }
Success #stdin #stdout 0.01s 20568KB
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stdin
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Standard input is empty
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 using php.
We have another sentence
https://ideone.com/6LZNZk
http://stackoverflow.com/q/24339084/
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
secret

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