Php obtains the php server variable in the current url path.

Php obtains the php server variable in the current url path.

Programming in php to obtain the current url address and server variables mainly uses the following global variables: $ _ server ["query_string"], $ _ server ["request_uri"], $ _ server ["script_name"], $ _ server ["php_self"] 1, $ _ server ["query_string"] description: query string 2, $ _ server ["request_uri"] description: uri3, $ _ server ["script_name"] description: Path 4 containing the current script, $ _ server ["php_self"] description: file name instance of the script being executed: 1, http://bbs.it-home.org/(directly open the home page) results: $ _ server ["query_string"] = "" $ _ server ["request_uri"] = "/" $ _ server ["script_name"] = "/index. php "$ _ server [" php_self "] ="/index. php "2, http://bbs.it-home.org /? P = 222 (with query) result: $ _ server ["query_string"] = "p = 222" $ _ server ["request_uri"] = "/? P = 222 "$ _ server [" script_name "] ="/index. php "$ _ server [" php_self "] ="/index. php "3, http://bbs.it-home.org/index.php? P = 222 & q = biuuu result: // Process request_uri If (! Isset ($ _ server ['request _ uri ']) { $ _ Server ['request _ uri '] = $ _ server ['php _ self']; If (isset ($ _ server ['query _ string']) $ _ server ['request _ uri ']. = '? '. $ _ Server ['query _ string']; } If ($ _ server ['request _ uri ']) { $ Temp = urldecode ($ _ server ['request _ uri ']); If (strexists ($ temp, '<') | strexists ($ temp ,'"')){ $ _ Get = shtmlspecialchars ($ _ get); // xss } } Echo $ _ server ['document _ root']." "; // Get the root variable of the server document Echo $ _ server ['php _ self ']." "; // Get the absolute path variable of the file server that executes the code Echo _ file __." "; // Get the absolute path variable of the file system Echo dirname (_ file _); // function used to obtain the path of the folder where the file is located ?> // Server function $ _ Server ["http_referer"] = http: // localhost/lianxi/ $ _ Server ["http_accept_language"] = zh-cn $ _ Server ["http_accept_encoding"] = gzip, deflate $ _ Server ["http_user_agent"] = mozilla/4.0 (compatible; msie 6.0; windows nt 5.2;. net clr 1.1.4322;. net clr 2.0.50727) $ _ Server ["http_host"] = localhost $ _ Server ["http_connection"] = keep-alive $ _ Server ["path"] = c: \ windows \ system32; c: \ windows \ system32 \ wbem; c: \ program files \ common files \ adobe \ agl; c: \ program files \ mysql server 5.0 \ bin; c: \ php \ ext $ _ Server ["systemroot"] = c: \ windows $ _ Server ["comspec"] = c: \ windows \ system32 \ cmd.exe $ _ Server ["pathext" cmd).comcmd.exe;. bat;. cmd;. vbs;. vbe;. js;. jse;. wsf;. wsh $ _ Server ["windir"] = c: \ windows $ _ Server ["server_signature"] = Apache/2.0.55 (win32) php/5.1.1 server at localhost port 80 \ which server is used $ _ Server ["server_software"] = apache/2.0.55 (win32) php/5.1.1 $ _ Server ["server_name"] = localhost \ server name $ _ Server ["server_addr"] = 127.0.0.1 $ _ Server ["server_port"] = 80 \ server port $ _ Server ["remote_addr"] = 127.0.0.1 $ _ Server ["document_root"] = d:/lianxi \ main directory of the website $ _ Server ["server_admin"] = sss@163.com \ mailbox set when apache is installed $ _ Server ["script_filename"] = d:/lianxi/servervalues. php \ absolute path of the current webpage, $ _ Server ["remote_port"] = 1076 \ remote port $ _ Server ["gateway_interface"] = cgi/1.1 $ _ Server ["server_protocol"] = http/1.1 $ _ Server ["request_method"] = get $ _ Server ["query_string"] =\\ get? Content after No. $ _ Server ["request_uri"] = Example:/lianxi/servervalues. php? A = 1 & B = 2 $ _ Server ["script_name"] = Example:/lianxi/servervalues. php $ _ Server ["php_self"] =/lianxi/servervalues. php \ returns the relative path of the current webpage. $ _ Server ["request_time"] = 1179190013 \ the unit of running time is 100,000 in milliseconds $ _ Server ["argv"] = array $ _ Server ["argc"] = 0 Example 2: /** _ File __, Getcwd (), $ _ Server ["request_uri"], $ _ Server ["script_name"], $ _ Server ["php_self"], $ _ Server ["script_filename"], Similarities and differences between these variables or functions. assume there is a request address: http://localhost:8080/test.php/age=20 Test. the complete php path is: d:/server/www/example/test. php 1), getcwd () will get the Directory of the page file requested by the browser. that is, test. directory where the php file is located: d:/server/www/example. php executes the require or include statement, such as inculde ("test_dir/test2.php"). in test2.php, the getcwd () function will return test. php directory. 2) use the _ file _ magic variable to obtain the complete path of the file where the _ file _ variable is located, such as test. in php, _ file _ will get d:/server/www/example/test. in php, test_dir/test2.php, _ file _ will get d:/server/ Www/example/test_dir/test2.php 3) and $ _ server ["script_filename"] get the complete path of the page file requested by the browser. test. use $ _ server ["script_name"] in php and test_dir/test2.php to get d:/server/www/example/test. php. 4) $ _ server ["script_name"] will get the file name of the page file requested by the browser. note: it is different from $ _ server ["script_name, this variable only obtains the file name and does not contain the path. php and test_dir/test2.php use $ _ server ["script_name"] to get test. php. of course, in test. php and test_dir/test2.php execute basename ($ _ server ["Script_filename"]) is the same as $ _ server ["script_name. run in test. php and test_dir/test2.php execute realpath ("test. the result is the same as $ _ server ["script_filename. 5) $ _ server ["php_self"] will get the file name of the browser request page and remove the question mark? After the content, note: does not contain the path, such as the request in the client http://localhost:8080/test.php?age=20&name=tom , The $ _ server ["php_self"] of test. php and test_dir/test2.php will get "test. php ". "Age = 20 & name = tom" is removed. If the client requests http://localhost:8080/test.php/age=20 & Name = tom, then test. php and test_dir/test2.php $ _ server ["php_self"] will get "test. php/age = 20 & name = tom ". 6) $ _ server ["request_uri"] will get the file name of the browser request page, and all the content after the file name (note: the content after the # Well number will be omitted ), for example http://localhost:8080/test.php?age=20&name=tom , The $ _ server ["reuest_uri"] of test. php and test_dir/test2.php will get "test. php ". "Age = 20 & name = tom" is removed. If the client requests http://localhost:8080/test.php/age=20 & Name = tom, then test. php and test_dir/test2.php $ _ server ["request_uri"] will get "test. php/age = 20 & name = tom ". Test. php: Echo "test1.php variables "; Echo "getcwd:", getcwd ()," "; Echo "_ file __:", _ file __," "; Echo "request_uri:", $ _ server ["request_uri"]," "; Echo "script_name:", $ _ server ["script_name"]," "; Echo "php_self:", $ _ server ["php_self"]," "; Echo "script_filename", $ _ server ["script_filename"]," "; // Include test2.php and output the above variables in test2.php. what is the difference: Include_once ("test2/test2.php "); ?>