<!DOCTYPE html>
<html>
<body>

<?php
$str1 = "Hello";
$str2 = "Hello world!";

printf("[%s] ",$str1); // String
printf("[%8s] ",$str1); // Right-justifies the string with spaces
printf("[%-8s] ",$str1); // Left-justifies the string value with spaces
printf("[%08s] ",$str1); // Zero-padding
printf("[%'*8s] ",$str1); // Adds "*"
printf("[%8.8s] ",$str2); // Left-justifies the string with spaces (cuts off characters after the specified value)
?>

</body>
</html>