how to get host in php code example

Example 1: php server name

echo $_SERVER['PHP_SELF'];
echo "<br>";
echo $_SERVER['SERVER_NAME'];
echo "<br>";
echo $_SERVER['HTTP_HOST'];
echo "<br>";
// echo $_SERVER['HTTP_REFERER'];
echo "<br>";
echo $_SERVER['HTTP_USER_AGENT'];
echo "<br>";
echo $_SERVER['SCRIPT_NAME'];

Example 2: php get hostname

<?php
echo gethostname(); // may output e.g,: sandie

// Or, an option that also works before PHP 5.3
echo php_uname('n'); // may output e.g,: sandie
?>