PHP restricts IP access. only access from specified IP addresses is allowed. wildcard * is allowed to filter IP addresses.

[Php] 01. /** 02. * check whether the Accessed ip address is specified to allow ip03. * Enterdescriptionhere... 04. */05. functioncheck_ip () {06. $ ALLOWED_IParray (& amp; #39; 192.168.2. * & amp; #39;, & amp; #39; 127.

[Php]

01 ./**
02. * check whether the Accessed ip address is a specified allowed ip address.
03. * Enter description here...
04 .*/
05. function check_ip (){
06. $ ALLOWED_IP = array ('192. 192. 2. * ', '192. 0.0.1', '192. 168.2.49 ');
07. $ IP = getIP ();
08. $ check_ip_arr = explode ('.', $ IP); // split the ip address to be detected into an array
09. # restrict IP addresses
10. if (! In_array ($ IP, $ ALLOWED_IP )){
11. foreach ($ ALLOWED_IP as $ val ){
12. if (strpos ($ val ,'*')! = False) {// A * replacement character is found
13. $ arr = array ();//
14. $ arr = explode ('.', $ val );
15. $ bl = true; // used to record whether matching is successful in loop detection
16. for ($ I = 0; $ I <4; $ I ++ ){
17. if ($ arr [$ I]! = '*') {// It is not equal to * and will be checked in. if it is a * symbol replacement, it will not be checked.
18. if ($ arr [$ I]! = $ Check_ip_arr [$ I]) {
19. $ bl = false;
20. break; // terminate the check to continue to check the next ip address
21 .}
22 .}
23.} // end
24. if ($ bl) {// if it is true, if a match is found, return
25. return;
26. die;
27 .}
28 .}
29.} // end foreach
30. header ('http/1.1 403 Forbidden ');
31. echo "Access forbidden ";
32. die;
33 .}
34 .}
/**
* Check whether the Accessed ip address is a specified allowed ip address.
* Enter description here...
*/
Function check_ip (){
$ ALLOWED_IP = array ('192. 192. 2. * ', '192. 0.0.1', '192. 168.2.49 ');
$ IP = getIP ();
$ Check_ip_arr = explode ('.', $ IP); // split the ip address to be detected into an array.
# IP address restriction
If (! In_array ($ IP, $ ALLOWED_IP )){
Foreach ($ ALLOWED_IP as $ val ){
If (strpos ($ val ,'*')! = False) {// A * replacement character is found
$ Arr = array ();//
$ Arr = explode ('.', $ val );
$ Bl = true; // used to record whether matching is successful in loop detection
For ($ I = 0; $ I <4; $ I ++ ){
If ($ arr [$ I]! = '*') {// It is not equal to * and will be checked in. if it is a * symbol replacement, it will not be checked.
If ($ arr [$ I]! = $ Check_ip_arr [$ I]) {
$ Bl = false;
Break; // terminate the check. this ip address continues to check the next ip address.
}
}
} // End
If ($ bl) {// if it is true, if it is found that a match is successful, return
Return;
Die;
}
}
} // End foreach
Header ('http/1.1 403 Forbidden ');
Echo "Access forbidden ";
Die;
}
} [Php]
01.
[Php]
01.

/**
02. * obtain the Accessed IP address
03. * Enter description here...
04 .*/
05. function getIP (){
06. return isset ($ _ SERVER ["HTTP_X_FORWARDED_FOR"])? $ _ SERVER ["HTTP_X_FORWARDED_FOR"]
07. :( isset ($ _ SERVER ["HTTP_CLIENT_IP"])? $ _ SERVER ["HTTP_CLIENT_IP"]
08.: $ _ SERVER ["REMOTE_ADDR"]);
09 .}

 
10.

 
11.
 
12. add check_ip (); to be checked. this function only allows the specified IP address to access the file, and provides wildcard * in the IP address to match multiple IP addresses www.2cto.com.
[Php]
/*** Obtain the Accessed IP ** Enter description here... */function getIP () {return isset ($ _ SERVER ["HTTP_X_FORWARDED_FOR"])? $ _ SERVER ["HTTP_X_FORWARDED_FOR"] :( isset ($ _ SERVER ["HTTP_CLIENT_IP"])? $ _ SERVER ["HTTP_CLIENT_IP"]: $ _ SERVER ["REMOTE_ADDR"]);}/**
* Obtain the Accessed IP address
* Enter description here...
*/
Function getIP (){
Return isset ($ _ SERVER ["HTTP_X_FORWARDED_FOR"])? $ _ SERVER ["HTTP_X_FORWARDED_FOR"]
:( Isset ($ _ SERVER ["HTTP_CLIENT_IP"])? $ _ SERVER ["HTTP_CLIENT_IP"]
: $ _ SERVER ["REMOTE_ADDR"]);
}

Add the check_ip (); to be detected. This function allows only the specified IP address to access the file, and provides the * wildcard in the IP address to match multiple IP addresses.