php gets the current url path php server variable

Programming in PHP programming to obtain the current url address and server variables, mainly using 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: URI required to access this page 3.$_server["script_name"] Description: Contains the path of the current script 4.$_server["php_self"] Description: The file name of the currently executing script Example: 1. http://bbs.it-home.org/ (open the homepage directly) result: $_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:

//Handle 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, ' $_get = shtmlspecialchars($_get);// xss
 }
}
echo $_server['document_root'].""; //Get the server document root variable
echo $_server['php_self '].""; //Get the variable of the absolute path of the file server that executes the code
echo __file__.""; //Get the variable of the absolute path of the file system of the file
echo dirname(__file__ ); //Function to get the folder path 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:windowssystem32;c:windows;c:windowssystem32wbem;c:program filescommon filesadobeagl;c: program filesmysqlmysql server 5.0bin;c:php;c:phpext
$_server["systemroot"]=c:windows
$_server["comspec"]=c:windowssystem32cmd.exe
$_server["pathext"]=.com ;.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 \What 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 \Home directory of the website
$_server["server_admin"]=sss@163.com \E-mail set when installing apache
$_server["script_filename"]=d:/lianxi/lianxi/servervalues .php \The absolute path of the current web page,
$_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? The content after the number
$_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 web page.
$_server["request_time"]=1179190013 \The running time unit is one hundred thousandth of a millisecond
$_server["argv"]=array
$ _server["argc"]=0

Example 2:

/**
__file__ ,
getcwd(),
$_server["request_uri"],
$_server["script_name"],
$_server["php_self"],
 $_server["script_filename"],

The similarities and differences of these variables or functions. Suppose there is a request address: http://localhost:8080/test.php/age=20 The full path of test.php is: d:/server/www/example/test.php 1), getcwd() You will get the directory where the page file requested by the browser is located. That is, the directory where the test.php file is located: d:/server/www/example/, If require or include statements are executed in test.php, such as inculde("test_dir/test2.php"), Then the getcwd() function in test2.php will also return the directory where test.php is located. 2)、__file__ A magic variable that can be used to get the full path of the file where the __file__ variable is located. For example: __file__ in test.php will get d:/server/www/example/test.php, __file__ in test_dir/test2.php will get d:/server/www/example/test_dir/test2.php 3), $_server["script_filename"] Will get the full path to the page file requested by the browser. Using $_server["script_name"] in test.php and test_dir/test2.php will 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: Unlike $_server["script_name"], this variable only gets the file name and does not include the path. Using $_server["script_name"] in test.php and test_dir/test2.php will result in test.php. Of course, executing basename($_server["script_filename"]) in test.php and test_dir/test2.php is the same as $_server["script_name"]. Execute realpath("test.php") in test.php and test_dir/test2.php and the result will be the same as $_server["script_filename"]. 5), $_server["php_self"] The file name of the page requested by the browser will be obtained, and the content after the question mark ? will be stripped off. Note: the path is not included. For example, request http://localhost:8080/test.php?age=20&name=tom in the client, Then $_server["php_self"] of both test.php and test_dir/test2.php will get "test.php". "age=20&name=tom" is stripped off. And if the client requests http://localhost:8080/test.php/age=20&name=tom, Then $_server["php_self"] of both test.php and test_dir/test2.php will get "test.php/age=20&name=tom". 6), $_server["request_uri"] Will get the file name of the page requested by the browser, and all the content after the file name (note: the content after the pound sign # will be omitted), For example, request http://localhost:8080/test.php?age=20&name=tom in the client, Then $_server["reuest_uri"] of both test.php and test_dir/test2.php will get "test.php". "age=20&name=tom" is stripped off. And if the client requests http://localhost:8080/test.php/age=20&name=tom, Then $_server["request_uri"] of both test.php and test_dir/test2.php 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, output the above variables in test2.php, and see the difference:
include_once("test2/test2.php");
?>