PHP makes information about your server available to your script. The Web server assigns values to the PHP superglobal $_SERVER array.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="EN" lang="EN">
<head>
<title>PHP</title>
<meta Name="Author" Content="Hann So">
</head>
<body>
<p>
<?php
foreach ($_SERVER as $key =>$value) {
echo "<tr>";
echo "<td><b>$key</b></td><td>$value</td>";
echo "</tr>";
}
?>
</p>
</body>
</html>
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