Php application path variable problem summary _ PHP Tutorial

Summary of php application path variables. Local server, domain name d.com, root path D: phpnowvhostsd.com. yii, with the requeir_onceaa.php file in the x. php code in the root directory, and aa. php requeir_onceabb.php

Local server, domain http://d.com, root path D: \ phpnow \ vhosts \ d.com. yii, which has Files/x. requeir_once/. php, and/. php and requeir_once/a/B. php

/X. php

$ _ SERVER ["HTTP_HOST"]: [d.com] // Host of the current request: Domain name information

$ _ SERVER ["PHP_SELF"]: [] //
$ _ SERVER ["SCRIPT_NAME"]: [/x. php ]//
$ _ SERVER ["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com. yii/x. php ]//.
_ FILE __:【]//.

$ _ SERVER ["REQUEST_URI"]: [/x. php/x/y/z.html? A = B & c = d] // all the content after/and in the url request.
$ _ SERVER ["QUERY_STRING"]: [a = B & c = d] // in the url request? .

$ _ SERVER ["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com. yii] // document root directory. Defined in the server configuration file

Basename ($ _ SERVER ["PHP_SELF "]): [] //
Basename ($ _ SERVER ["SCRIPT_NAME"]): [x. php] //
Basename ($ _ SERVER ["SCRIPT_FILENAME"]): [x. php] //
Basename (_ FILE _): [] //

Dirname ($ _ SERVER ["PHP_SELF "]): [] //
Dirname ($ _ SERVER ["SCRIPT_NAME "]): [\] //
Dirname ($ _ SERVER ["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com. yii] //
Dirname (_ FILE _): [] //

Require_once/a. php

$ _ SERVER ["HTTP_HOST"]: [d.com] // Host of the current request: Domain name information

$ _ SERVER ["PHP_SELF"]: [] //
$ _ SERVER ["SCRIPT_NAME"]: [/x. php ]//
$ _ SERVER ["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com. yii/x. php ]//.
_ FILE __:【]//.

$ _ SERVER ["REQUEST_URI"]: [/x. php/x/y/z.html? A = B & c = d] // all the content after/and in the url request.
$ _ SERVER ["QUERY_STRING"]: [a = B & c = d] // in the url request? .

$ _ SERVER ["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com. yii] // document root directory. Defined in the server configuration file

Basename ($ _ SERVER ["PHP_SELF "]): [] //
Basename ($ _ SERVER ["SCRIPT_NAME"]): [x. php] //
Basename ($ _ SERVER ["SCRIPT_FILENAME"]): [x. php] //
Basename (_ FILE _): [] //

Dirname ($ _ SERVER ["PHP_SELF "]): [] //
Dirname ($ _ SERVER ["SCRIPT_NAME "]): [\] //
Dirname ($ _ SERVER ["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com. yii] //
Dirname (_ FILE _): [] //

Require_once/a/B. php

$ _ SERVER ["HTTP_HOST"]: [d.com] // Host of the current request: Domain name information

$ _ SERVER ["PHP_SELF"]: [] //
$ _ SERVER ["SCRIPT_NAME"]: [/x. php ]//
$ _ SERVER ["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com. yii/x. php ]//.
_ FILE __:【]//.

$ _ SERVER ["REQUEST_URI"]: [/x. php/x/y/z.html? A = B & c = d] // all the content after/and in the url request.
$ _ SERVER ["QUERY_STRING"]: [a = B & c = d] // in the url request? .

$ _ SERVER ["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com. yii] // document root directory. Defined in the server configuration file

Basename ($ _ SERVER ["PHP_SELF "]): [] //
Basename ($ _ SERVER ["SCRIPT_NAME"]): [x. php] //
Basename ($ _ SERVER ["SCRIPT_FILENAME"]): [x. php] //
Basename (_ FILE _): [] //

Dirname ($ _ SERVER ["PHP_SELF "]): [] //
Dirname ($ _ SERVER ["SCRIPT_NAME "]): [\] //
Dirname ($ _ SERVER ["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com. yii] //
Dirname (_ FILE _): [] //

/A. php

$ _ SERVER ["HTTP_HOST"]: [d.com] // Host of the current request: Domain name information

$ _ SERVER ["PHP_SELF"]: [] //
$ _ SERVER ["SCRIPT_NAME"]: [/a. php ]//
$ _ SERVER ["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com. yii/a. php ]//.
_ FILE __:【]//.

$ _ SERVER ["REQUEST_URI"]: [/a. php/x/y/z.html? A = B & c = d] // all the content after/and in the url request.
$ _ SERVER ["QUERY_STRING"]: [a = B & c = d] // in the url request? .

$ _ SERVER ["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com. yii] // document root directory. Defined in the server configuration file

Basename ($ _ SERVER ["PHP_SELF "]): [] //
Basename ($ _ SERVER ["SCRIPT_NAME"]): [a. php] //
Basename ($ _ SERVER ["SCRIPT_FILENAME"]): [a. php] //
Basename (_ FILE _): [] //

Dirname ($ _ SERVER ["PHP_SELF "]): [] //
Dirname ($ _ SERVER ["SCRIPT_NAME"]): [/] //
Dirname ($ _ SERVER ["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com. yii/] //
Dirname (_ FILE _): [] //

Require_once/a/B. php

$ _ SERVER ["HTTP_HOST"]: [d.com] // Host of the current request: Domain name information

$ _ SERVER ["PHP_SELF"]: [] //
$ _ SERVER ["SCRIPT_NAME"]: [/a. php ]//
$ _ SERVER ["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com. yii/a. php ]//.
_ FILE __:【]//.

$ _ SERVER ["REQUEST_URI"]: [/a. php/x/y/z.html? A = B & c = d] // all the content after/and in the url request.
$ _ SERVER ["QUERY_STRING"]: [a = B & c = d] // in the url request? .

$ _ SERVER ["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com. yii] // document root directory. Defined in the server configuration file

Basename ($ _ SERVER ["PHP_SELF "]): [] //
Basename ($ _ SERVER ["SCRIPT_NAME"]): [a. php] //
Basename ($ _ SERVER ["SCRIPT_FILENAME"]): [a. php] //
Basename (_ FILE _): [] //

Dirname ($ _ SERVER ["PHP_SELF "]): [] //
Dirname ($ _ SERVER ["SCRIPT_NAME"]): [/] //
Dirname ($ _ SERVER ["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com. yii/] //
Dirname (_ FILE _): [] //

/X. php

 /X. php
 "'$ _ SERVER [" HTTP_HOST "]: [', ['http _ host'],"] // HOST of the current request: Domain name information ","
"'
''' $ _ SERVER ["PHP_SELF"]: [', ['php _ SELF'], "] // relative address of the request execution file ","
"'$ _ SERVER [" SCRIPT_NAME "]: [', ['script _ name']," // relative address of the actual execution file ","
"'$ _ SERVER [" SCRIPT_FILENAME "]: [', ['script _ FILENAME ']," // absolute path of the actual execution file. ","
"'_ FILE _: [',"] // absolute path of the actually executed code. ","
"'
''' $ _ SERVER ["REQUEST_URI"]: [', ['request _ URI'], "] // all the content after/and in a url REQUEST. ","
"'$ _ SERVER [" QUERY_STRING "]: [', ['query _ string'],"] // url request? . ","
"'
''' $ _ SERVER ["DOCUMENT_ROOT"]: [', ['document _ root'], "] // document root directory. Define "," in the server configuration file ","
""
"'Basename ($ _ SERVER [" PHP_SELF "]): [', (['php _ SELF']),"] // file name of the file requesting execution ","
"'Basename ($ _ SERVER [" SCRIPT_NAME "]): [', (['script _ name']),"] // file NAME of the actually executed file ","
"'Basename ($ _ SERVER [" SCRIPT_FILENAME "]): [', (['script _ filename'])," // file name of the actually executed file ","
"'Basename (_ FILE _): [', (),"] // FILE name of the actually executed code ","
"";"
"'Dirname ($ _ SERVER [" PHP_SELF "]): [', (['php _ SELF']),"] // Directory of the request execution file ","
"'Dirname ($ _ SERVER [" SCRIPT_NAME "]): [', (['script _ name'])," // Directory of the actual execution file ","
"'Dirname ($ _ SERVER [" SCRIPT_FILENAME "]): [', (['script _ filename'])," // Directory of the actual execution file ","
"'Dirname (_ FILE _): [', (),"] // Directory of the actually executed code ","
"";"
"" Require_once "(" a/a. php ");

/A. php

 "'$ _ SERVER [" HTTP_HOST "]: [', ['http _ host'],"] // HOST of the current request: Domain name information ","
"'
''' $ _ SERVER ["PHP_SELF"]: [', ['php _ SELF'], "] // relative address of the request execution file ","
"'$ _ SERVER [" SCRIPT_NAME "]: [', ['script _ name']," // relative address of the actual execution file ","
"'$ _ SERVER [" SCRIPT_FILENAME "]: [', ['script _ FILENAME ']," // absolute path of the actual execution file. ","
"'_ FILE _: [',"] // absolute path of the actually executed code. ","
"'
''' $ _ SERVER ["REQUEST_URI"]: [', ['request _ URI'], "] // all the content after/and in a url REQUEST. ","
"'$ _ SERVER [" QUERY_STRING "]: [', ['query _ string'],"] // url request? . ","
"'
''' $ _ SERVER ["DOCUMENT_ROOT"]: [', ['document _ root'], "] // document root directory. Define "," in the server configuration file ","
""
"'Basename ($ _ SERVER [" PHP_SELF "]): [', (['php _ SELF']),"] // file name of the file requesting execution ","
"'Basename ($ _ SERVER [" SCRIPT_NAME "]): [', (['script _ name']),"] // file NAME of the actually executed file ","
"'Basename ($ _ SERVER [" SCRIPT_FILENAME "]): [', (['script _ filename'])," // file name of the actually executed file ","
"'Basename (_ FILE _): [', (),"] // FILE name of the actually executed code ","
"";"
"'Dirname ($ _ SERVER [" PHP_SELF "]): [', (['php _ SELF']),"] // Directory of the request execution file ","
"'Dirname ($ _ SERVER [" SCRIPT_NAME "]): [', (['script _ name'])," // Directory of the actual execution file ","
"'Dirname ($ _ SERVER [" SCRIPT_FILENAME "]): [', (['script _ filename'])," // Directory of the actual execution file ","
"'Dirname (_ FILE _): [', (),"] // Directory of the actually executed code ","
"";"
"" Require_once "(" B/B. php ");

/A/B/php

 "'$ _ SERVER [" HTTP_HOST "]: [', ['http _ host'],"] // HOST of the current request: Domain name information ","
"'
''' $ _ SERVER ["PHP_SELF"]: [', ['php _ SELF'], "] // relative address of the request execution file ","
"'$ _ SERVER [" SCRIPT_NAME "]: [', ['script _ name']," // relative address of the actual execution file ","
"'$ _ SERVER [" SCRIPT_FILENAME "]: [', ['script _ FILENAME ']," // absolute path of the actual execution file. ","
"'_ FILE _: [',"] // absolute path of the actually executed code. ","
"'
''' $ _ SERVER ["REQUEST_URI"]: [', ['request _ URI'], "] // all the content after/and in a url REQUEST. ","
"'$ _ SERVER [" QUERY_STRING "]: [', ['query _ string'],"] // url request? . ","
"'
''' $ _ SERVER ["DOCUMENT_ROOT"]: [', ['document _ root'], "] // document root directory. Define "," in the server configuration file ","
""
"'Basename ($ _ SERVER [" PHP_SELF "]): [', (['php _ SELF']),"] // file name of the file requesting execution ","
"'Basename ($ _ SERVER [" SCRIPT_NAME "]): [', (['script _ name']),"] // file NAME of the actually executed file ","
"'Basename ($ _ SERVER [" SCRIPT_FILENAME "]): [', (['script _ filename'])," // file name of the actually executed file ","
"'Basename (_ FILE _): [', (),"] // FILE name of the actually executed code ","
"";"
"'Dirname ($ _ SERVER [" PHP_SELF "]): [', (['php _ SELF']),"] // Directory of the request execution file ","
"'Dirname ($ _ SERVER [" SCRIPT_NAME "]): [', (['script _ name'])," // Directory of the actual execution file ","
"'Dirname ($ _ SERVER [" SCRIPT_FILENAME "]): [', (['script _ filename'])," // Directory of the actual execution file ","
"'Dirname (_ FILE _): [', (),"] // Directory of the actually executed code ","
"";"
";

Mongod: \ phpnow \ vhosts \ d.com. yii, which has Files/x. requeir_once/. php, and/. php and requeir_once/a/B. php...