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  1. <?php
  2. $string = "Initial string: <h1 class='blue'>Test</h1> Blah blah blah 'Test'";
  3. $new_string = preg_replace_callback('#<(?!\/)(?:[^<>]|(?R))*>#', function($m){
  4.     return str_replace("'", '"', $m[0]);
  5. }, $string);
  6. echo $new_string;
  7. ?>
Success #stdin #stdout 0.01s 20568KB
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Standard input is empty
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Initial string: <h1 class="blue">Test</h1> Blah blah blah 'Test'
https://ideone.com/vSjZ84
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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