Summary of global variables by default in PHP

<? PHP
Echo "complete set of system default variable commands <p> ";
Echo
$ _ Server ['php _ Self ']. "<br> the file name of the script being executed, which is related to document root. <p> ",
$ _ Server ['argv']. "<br> parameters passed to the script <p> ",
$ _ Server ['argc ']. "<br> Number of command line parameters that are passed to the Program (if running in command line mode) <p> ",
$ _ Server ['Gateway _ interface']. "<br> the CGI standard version used by the server. For example, "cgi/1.1" <p> ",
$ _ Server ['server _ name']. "<br> name of the server host where the script is currently running <p> ",
$ _ Server ['server _ soft']. "<br> the string of the server identifier, which is provided in the header of the Response Request <p> ",
$ _ Server ['server _ Protocol']. "<br> name and version of the communication protocol on the request page. For example, "HTTP/1.0" <p> ",
$ _ Server ['request _ method']. "<br> the request method used to access the page. For example: "Get", "head", "Post", "put" <p> ",
$ _ Server ['query _ string']. "<br> query string <p> ",
$ _ Server ['document _ root']. "<br> the root directory of the document where the script is currently running. Define in the server configuration file <p> ",
$ _ Server ['HTTP _ Accept ']. "<br> Accept of the current request: Content in the header <p> ",
$ _ Server ['HTTP _ accept_charset ']. "<br> Accept-charset of the current request: Content in the header. Example: "iso-8859-1, *, UTF-8" <p> ",
$ _ Server ['HTTP _ accept_encoding ']. "<br> Accept-encoding of the current request: Content in the header. For example, "gzip" <p> ",
$ _ Server ['HTTP _ accept_language ']. "<br> Accept-language of the current request: Content in the header. For example, "en" <p> ",
$ _ Server ['HTTP _ connection']. "<br> connection of the current request: Content in the header. For example, "keep-alive" <p> ",
$ _ Server ['HTTP _ host']. "<br> current requested HOST: header content <p> ",
$ _ Server ['HTTP _ referer']. "<br> link to the URL of the previous page on the current page <p> ",
$ _ Server ['HTTP _ user_agent ']. "<br> user_agent of the current request: Content in the header <p> ",
$ _ Server ['https']. "<br> if you use https for access, it is set to a non-null value (on); otherwise, off is returned. <p> ",
$ _ Server ['remote _ ADDR ']. "<br> browsing the IP address of the user on the current page <p> ",
$ _ Server ['remote _ host']. "<br> browsing the host name of the user on the current page <p> ",
$ _ Server ['remote _ port']. "<br> the port used by the user to connect to the server <p> ",
$ _ Server ['script _ filename']. "<br> absolute path name of the currently executed script <p> ",
$ _ Server ['server _ admin']. "<br> administrator Information <p> ",
$ _ Server ['server _ port']. "<br> port used by the server <p> ",
$ _ Server ['server _ signature ']. "<br> a string containing the server version and virtual host name <p> ",
$ _ Server ['path _ translated ']. "<br> basic path of the file system where the current script is located (not the root directory of the document) <p> ",
$ _ Server ['script _ name']. "<br> contains the path of the current script. This is useful when the page needs to point to itself <p> ",
$ _ Server ['request _ URI ']. "<br> URI required to access this page ., For example, "/index.html" <p> ",
$ _ Server ['php _ auth_user ']. "<br> when PHP runs in the Apache module and uses the HTTP authentication function, this variable is the user name <p> ",
$ _ Server ['php _ auth_pw ']. "<br> when PHP runs in the Apache module mode and uses the HTTP authentication function, this variable is the password entered by the user <p> ",
$ _ Server ['auth _ type']. "<br> when PHP runs in the Apache module mode and uses the HTTP authentication function, this variable is the authentication type <p> ";
?>