16.
What will be the output of the following PHP code?
<?php
echo str_pad("Salad", 5)." is good.";
?>

19.
What will be the output of the following PHP code?
<?php
$author = "nachiketh@example.com";
$author = str_replace("a","@",$author);
echo "Contact the author of this article at $author.";
?>

20.
What will be the output of the following PHP code?
<?php
$url = "contact@examveda.com";
echo ltrim(strstr($url, "@"),"@");
?>