how to use a variable in preg_match php code example

Example 1: preg_match in php

<?php
   $line = "Vi is the greatest word processor ever created!";
   // perform a case-Insensitive search for the word "Vi"
   
   if (preg_match("/\bVi\b/i", $line, $match)) :
      print "Match found!";
      endif;
?>

Example 2: preg_match in php

<html>
   
   <head>
      <title>Hello World</title>
   </head>
   
   <body>
      <?php echo "Hello, World!";?>
   </body>

</html>

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