Today we will learn about PHP common system functions server and files

Self-made development projects are not many, $_server and $_files, these two commonly used methods are usually used to manipulate the URL and file upload, I use today's time to familiarize myself with this two commonly used functions, and do some summary, if you need friends, can also see

2. <?php
4. Some information in the browser section
6. echo $_server[' php_self ']. " <br/> "; The function output is the name of your current open file, such as:/default.php
8. echo $_server[' Gateway_interface ']. " <br/> "; Output your CGI (Gateway Interface) information, such as: cgi/1.1
10. echo $_server[' http_accept ']. " <br/> ";
12. echo $_server[' Http_accept_language ']. " <br/> "; Language used by the browser
14. echo $_server[' http_connection ']. " <br/> "; Pre-requested Connection: The contents of the header.
16. Some of the functions common to users
18. echo $_server[' REMOTE_ADDR ']. " <br/> "; #正在浏览当前页面用户的 IP address. such as: 127.0.0.1
20. echo $_server[' Remote_host ']. " <br/> "; #正在浏览当前页面用户的主机名.
22. echo $_server[' Remote_port ']. " <br/> "; #用户连接到服务器时所使用的端口. such as: 56634, PHP is unable to obtain the user's MAC address

2. Some functions on the server side
4. echo $_server[' Server_admin ']. " <br/> ";//Administrator Information
6. echo $_server[' Server_port ']. " <br/> "; #服务器所使用的端口, such as: 80
8. echo $_server[' Script_filename ']. " <br/> "; #当前执行脚本的绝对路径名. such as: f:/www1/default.php
10. echo $_server[' Document_root ']. " <br/> "; The function is to enter the location of your site, such as: F:/WWW1
12. echo $_server[' Request_method ']. " <br/> "; How users request access to the page
14. Some functions about URLs
16. echo $_server[' query_string ']. " <br/> "; Query string, but it feels like a parameter passed by a GET method
18. echo $_server[' Http_host ']. " <br> "; #localhost
20. echo $_server[' php_self ']. " <br> "; Get web address #/blog/testurl.php
22. echo $_server["Query_string"]. " <br> "; Get URL parameter #id =5
24. echo $_server[' Http_referer ']. " <br> ";//Get User Agent
26. Get the full URL
28. Echo ' http://' $_server[' http_host '].$_server[' Request_uri '];
30. Echo ' http://'. $_server[' http_host '].$_server[' php_self ']. $_server[' query_string '; #http://localhost/blog/testurl.php?id=5

1. Echo ' http://'. $_server[' server_name ', '. '. $_server["Server_port"].$_server["Request_uri"]; Full url#http://localhost:80/blog/testurl.php?id=5 with port number
2. $url = ' http://' $_server[' server_name '].$_server["Request_uri"];
3. echo dirname ($url);//Fetch path only #http://localhost/blog

2. ?>
4. <!------------------get the user's MAC address------------------------>
6. <?php
8. @exec ("Arp-a", $array); Executes the ARP-A command, and the result is placed in the array $array
10. echo "<pre>";
12. Print_r ($array); Prints the obtained array
14. foreach ($array as $value)
16. {
18. if (//match result put to array $mac_array
20. Strpos ($value, $_server["REMOTE_ADDR"]) &&
22. Preg_match ("/(:?? [ 0-9a-f]{2}[:-]) {5}[0-9a-f]{2}/i ", $value, $mac _array)
24. )
26. {
28. $mac = $mac _array[0];
30. Break
32. }
34. }
36. Echo $mac; Output Client Mac
38. ?>

About the MAC address, I in the test can get to the LAN station other accounts of the Mac, but my own Mac is unable to obtain, do not know what is the situation, is it my environment problem? I'll take care of it later!

Today we will learn about PHP common system functions server and files