PHP Tutorials - Herong's Tutorial Examples - v5.17, by Herong Yang
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 Apache Web server. First copy HttpRequestDetails.php to \apache\htdocs, 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: REDIRECT_HANDLER = application/x-httpd-php REDIRECT_STATUS = 200 HTTP_HOST = localhost HTTP_CONNECTION = keep-alive HTTP_UPGRADE_INSECURE_REQUESTS = 1 HTTP_REFERER = http://localhost/ HTTP_ACCEPT_ENCODING = gzip, deflate, br HTTP_ACCEPT_LANGUAGE = en-US,en;q=0.9 SystemRoot = C:\windows COMSPEC = C:\windows\system32\cmd.exe PATHEXT = .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC WINDIR = C:\windows SERVER_SIGNATURE = SERVER_SOFTWARE = Apache/2.4.37 (Win64) SERVER_NAME = localhost SERVER_ADDR = ::1 SERVER_PORT = 80 REMOTE_ADDR = ::1 DOCUMENT_ROOT = C:/apache/htdocs ......
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:/apache/htdocs" is piece of information from the Web server telling us that the Web server picks up HTTP documents and scripts from the c:/apache/htdocs directory.
Table of Contents
Introduction and Installation of PHP
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
Interface with Operating System
Introduction of Class and Object
Integrating PHP with Apache Web Server
►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
Parsing and Managing HTML Documents
Configuring and Sending Out Emails
Managing PHP Engine and Modules on macOS