Web Server Information in $_SERVER

This section provides a tutorial example on how to dump Web server information stored in the $_SERVER array.

Now, let's run HttpRequestDetails.php on the local IIS Web server. First copy HttpRequestDetails.php to \inetpub\wwwroot, then run Internet Explorer (IE) with http://localhost/HttpRequestDetails.php. You should get:

Contents of $_GET:

Contents of $_POST:

Contents of $_COOKIE:

Contents of $_REQUEST:

Contents of $_SERVER:
   CONTENT_LENGTH = 0
   GATEWAY_INTERFACE = CGI/1.1
   HTTP_ACCEPT = */*
   HTTP_ACCEPT_LANGUAGE = en-us
   HTTP_CONNECTION = Keep-Alive
   HTTP_HOST = localhost
   HTTP_ACCEPT_ENCODING = gzip, deflate
   HTTPS = off
   INSTANCE_ID = 1
   LOCAL_ADDR = 127.0.0.1
   NUMBER_OF_PROCESSORS = 1
   OS = Windows_NT
   ProgramFiles = C:\Program Files
   REMOTE_ADDR = 127.0.0.1
   REMOTE_HOST = 127.0.0.1
   REQUEST_METHOD = GET
   SCRIPT_NAME = /HttpRequestDetails.php
   SERVER_NAME = localhost
   SERVER_PORT = 80
   SERVER_PORT_SECURE = 0
   SERVER_PROTOCOL = HTTP/1.1
   SystemDrive = C:
   ORIG_PATH_INFO = /HttpRequestDetails.php
   ORIG_SCRIPT_NAME = /HttpRequestDetails.php
   DOCUMENT_ROOT = c:/inetpub/wwwroot
   SCRIPT_FILENAME = c:\inetpub\wwwroot\HttpRequestDetails.php
   PHP_SELF = /HttpRequestDetails.php
   ......

Note that $_GET, $_POST, $_COOKIE, and $_REQUEST are still all empty, because HTTP request contains no information submitted using the GET or POST method. And there are no cookies in the HTTP request.

However, other information contained in the HTTP request and gathered from the Web server is stored in the $_SERVER array now. For example, "DOCUMENT_ROOT = c:/inetpub/wwwroot" is piece of information from the Web server telling us that the Web server picks up HTTP documents and scripts from the c:/inetpub/wwwroot directory.

Last update: 2015.

Table of Contents

 About This Book

 Introduction and Installation of PHP 7.0

 PHP Script File Syntax

 PHP Data Types and Data Literals

 Variables, References, and Constants

 Expressions, Operations and Type Conversions

 Conditional Statements - "if" and "switch"

 Loop Statements - "while", "for", and "do ... while"

 Function Declaration, Arguments, and Return Values

 Arrays - Ordered Maps

 Configuring and Sending out Emails

Retrieving Information from HTTP Requests

 Predefined Variables Related to HTTP Requests

 Operating System Information in $_SERVER

Web Server Information in $_SERVER

 Information in $_GET and $_REQUEST

 Registering $_REQUEST Keys as Global Variables

 Creating and Managing Sessions in PHP Scripts

 Sending and Receiving Cookies in PHP Scripts

 Controlling HTTP Response Header Lines in PHP Scripts

 MySQL Server Connection and Access Functions

 Functions to Manage Directories, Files and Images

 SOAP Extension Function and Calling Web Services

 SOAP Server Functions and Examples

 Localization Overview of Web Applications

 Using Non-ASCII Characters in HTML Documents

 Using Non-ASCII Characters as PHP Script String Literals

 Receiving Non-ASCII Characters from Input Forms

 "mbstring" Extension and Non-ASCII Encoding Management

 Managing Non-ASCII Character Strings with MySQL Servers

 Introduction of Class and Object

 Integrating PHP with Apache Web Server

 Outdated Tutorials

 References

 PDF Printing Version