How to get system information in PHP

$root = getenv (' Document_root '); Server Document root directory
$port = getenv (' Server_port '); Server port
$file = getenv (' Script_name '); Current execution file
$ua = getenv (' http_user_agent '); User UA
$method = getenv (' Request_method '); Request method
$protocol = getenv (' Server_protocol '); Transport protocol
Getmypid (),////returns the process ID number of the current PHP process, which does not require input parameters.
Get_current_user (),////returns the owner name of the current program, and the function does not require input parameters.

Copy Code code as follows:

Get system Type and version number: Php_uname () (Example: Windows NT COMPUTER 5.1 build 2600)
Get system type only: Php_uname (' s ') (or: Php_os, Example: Windows NT)
Get System version number only: Php_uname (' R ') (example: 5.1)
Get PHP run by: php_sapi_name () (PHP run Mode:apache2handler)
Get previous process user name: get_ Current_User ()
Get PHP Version: Php_version
Get Zend version: Zend_version ()
Get PHP installation path: Default_include_path
Get the current file absolute path: __file__
Get HOST value in HTTP request: $_server["Http_host" (return value is domain name or IP)
Get server Ip:gethostbyname ($_server[' Server_Name '])
Accept the requested server IP: $_server["server_addr"] (sometimes not available, recommended: gethostbyname ($_server[' server_name '))
Get client IP: $_server[' remote_addr '
Get server Interpreter engine: $_server[' server_software ']
Get server CPU number: $_server[' processor_ IDENTIFIER ']
Get Server system directory: $_server[' SystemRoot ']
Get server domain name: $_server[' server_name ' (Recommended: $_server["Http_host"]
Get user domain name: $_server[' UserDomain ']
Get server language: $_server[' http_accept_language '
Get Server Web port: $_server[' Server_ PORT ']