The $_SERVER variable and visitor IP address

 

The result of the following code:

 

<?php echo $_SERVER["REMOTE_ADDR"]; ?>

 

is:

 

38.107.179.236

 

Which is your IP address

 

Consider the following PHP code:

 

<table border="1">
<?php
foreach($_SERVER as $key => $value) {
echo "<tr><th>" . $key . "</th><td>" .$value . "</td></tr>\n";
}
?>
</table>

This code will output information in rows in a table. If you click the button below you will see it contains a lot of information about the visitor and the server.

 

To see the output of this code click here:

 

You will see that some values are not set for example no cookie was set so HTTP_COOKIE will have no value etc. Note that from PHP, HTTP_COOKIE would be accessed using the code:

 

<?php $_SERVER['HTTP_COOKIE'] ?>

other $_SERVER variables are accessed using:

 

<?php

$_SERVER['REMOTE_ADDR'];
$_SERVER['HTTP_REFERER'];
$_SERVER['QUERY_STRING'];

?>

.