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<!DOCTYPE html>
<html>
<body>
<?php
$a = "32"; // string 
settype($a, "integer"); // $a is now integer
$b = 32; // integer 
settype($b, "string"); // $b is now string
$c = true; // boolean 
settype($c, "integer"); // $c is now integer (1)
?>
</body>
</html>