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  1. <?php
  2.  
  3. $str = "Loreum Ipsum Dolor Sit Amet <code>Some HTML Code like <h1>Head</h1></code>. Loreum Ipsum <code>Some Code</code> Dolor Sit Amet.";
  4. $str = preg_replace_callback(
  5.     '|(?s)(?<=<code>).*?(?=</code>)|',
  6.     function ($matches) {
  7.         return str_replace('<', '&lt;', $matches[0]);
  8.     },
  9.     $str
  10. );
  11. echo $str;
Success #stdin #stdout 0.02s 24728KB
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Loreum Ipsum Dolor Sit Amet <code>Some HTML Code like &lt;h1>Head&lt;/h1></code>. Loreum Ipsum <code>Some Code</code> Dolor Sit Amet.
https://ideone.com/hqW86G
language:
PHP (php 7.3.5)
created:
4 years ago
visibility:
public

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