PHP

LEARNING MORE ABOUT THE $_SERVER ARRAY IN PHP

PHP automatically stores some useful and important information in the $_SERVER super global array. To see the values of all elements of this array, use a foreach loop as follows:

foreach($_SERVER as $key => $value)

{

echo $key." ".$value."<br>";

}

This will output a whole list of useful server information. You can singly extract the most important as below. Click the links to learn more about these variables:

$_SERVER['HTTP_REFERER']

$_SERVER['HTTP_USER_AGENT']

$_SERVER['REMOTE_ADDR']

$_SERVER['PHP_SELF']

$_SERVER['REQUEST_URI']

$_SERVER['DOCUMENT_ROOT']

$_SERVER['HTTP_HOST']

$_SERVER['QUERY_STRING']

$_SERVER['SCRIPT_FILENAME']