Hello everyone, today we are going to learn PHP $_SEVER variable. Which is a super global variable and contains header information, path information, script locations. They are available in all scopes throughout a script. Entries to this global variable is done by web server.
Below table describes $_SERVER variables and its use.
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| CODE | DESCRIPTION |
|---|---|
| $_SERVER[‘PHP_SELF’] | Return filename of currently executing file |
| $_SERVER[‘GATEWAY_INTERFACE’] | Return the CGI of server (CGI – Common Gateway Interface.) |
| $_SERVER[‘SERVER_ADDR’] | Return server IP address |
| $_SERVER[‘SERVER_NAME’] | Return the name of server |
| $_SERVER[‘SERVER_SOFTWARE’] | Returns server identification string |
| $_SERVER[‘SERVER_PROTOCOL’] | Returns name and revision of information protocol. |
| $_SERVER[‘REQUEST_METHOD’] | Returns request method (Eg: GET/POST) |
| $_SERVER[‘REQUEST_TIME’] | Returns timestamp of the request |
| $_SERVER[‘QUERY_STRING’] | Returns the query string, which the page accessed |
| $_SERVER[‘HTTP_ACCEPT’] | Returns accepted contents (eg:ext/html,application/xhtml+xml etc) |
| $_SERVER[‘HTTP_ACCEPT_CHARSET’] | Accept_charset from current request header |
| $_SERVER[‘HTTP_HOST’] | Returns host name of the request |
| $_SERVER[‘HTTP_REFERER’] | Complete path of the file where it is located |
| $_SERVER[‘REMOTE_ADDR’] | IP address from where the user is viewing the current file. |
| $_SERVER[‘REMOTE_HOST’] | Host name from where the user is viewing the current file |
| $_SERVER[‘REMOTE_PORT’] | Returns port number where the clients machine is communicating with web server |
| $_SERVER[‘SCRIPT_FILENAME’] | Absolute pathname of the file where it is located. |
| $_SERVER[‘SERVER_ADMIN’] | The value given to the server admin directive in the web server configuration file |
| $_SERVER[‘SERVER_PORT’] | Return the port used for web server communication |
| $_SERVER[‘SERVER_SIGNATURE’] | Server version and virtual host name. |
| $_SERVER[‘PATH_TRANSLATED’] | Returns file system |
| $_SERVER[‘SCRIPT_NAME’] | path of current script |
| $_SERVER[‘SCRIPT_URI’] | URI of current page |
