What will be the output of the following PHP code?<?php$n

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What will be the output of the following PHP code?

<?php
$n = "102030";
if (!filter_var($n, FILTER_VALIDATE_INT))
echo("Given Integer is not valid");
else
echo("Above Integer is valid");
?>

1. Error
2. Nothing
3. Given Integer is valid
4. Given Integer is not valid
5. None of these

filter_var() – Filters a single variable with a specified filter.