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<!DOCTYPE html>
<html>
<body>
​
<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland", 23);
​
if (in_array("23", $people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  } 
if (in_array("Glenn",$people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }
​
if (in_array(23,$people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }
?>
​
</body>
</html>
​
Match not found
Match found
Match found