<!DOCTYPE html>
<html>
<body>

<?php
$str1 = "1 + 1 = 2";
$str2 = "1 * 1 = 1";
$str3 = "Could you borrow me 5$?";
$str4 = "Are you not entertained? (I am..)";
$str5 = "The caret [ ^ ] Looks like a hat!";

echo quotemeta($str1)." ";
echo quotemeta($str2)." ";
echo quotemeta($str3)." ";
echo quotemeta($str4)." ";
echo quotemeta($str5)." ";
?>

</body>
</html>