Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > How to implement filtering IP black and white lists in PHP

How to implement filtering IP black and white lists in PHP

WBOY
Release： 2016-07-25 09:05:29
Original
1228 people have browsed it
  2. function ip_test($ip,$iprule){
  3. $ipruleregexp=str_replace('.*','ph',$iprule);
  4. $ipruleregexp=preg_quote($ipruleregexp,'/');
  5. $ ipruleregexp=str_replace('ph','.[0-9]{1,3}',$ipruleregexp);
  7. if(preg_match('/^'.$ipruleregexp.'$/',$ip)) return true;
  8. else return false;
  9. }
Copy the code

After implementing the core function ip_test, the following process is much simpler. It is nothing more than simply traversing each rule in the list to determine the currently connected IP Whether it complies with the rules and take the corresponding steps. Whitelist, proceed when an IP meets at least one rule:

  2. $curr_ip=$_SERVER['REMOTE_ADDR'];
  3. $white_list=array(...); //Whitelist rules
  4. $test_success=false;
  5. foreach($white_list as $iprule){
  6. if(ip_test($curr_ip,$iprule)){
  7. $test_success=true;
  8. break;
  9. }
  10. }
  11. if(!$test_success) exit('IP not in white list');
Copy code

Blacklist, proceed when IP does not meet all rules:

  2. $curr_ip=$_SERVER['REMOTE_ADDR'];
  3. $black_list=array(...); //Blacklist rules
  4. foreach($black_list as $iprule){
  5. if(ip_test($curr_ip ,$iprule)){
  6. exit('IP in black list');
  7. }
  8. }
Copy code

At this point, a simple PHP implementation of IP black and white list filtering is completed. I hope it can be used by everyone. Come help. Articles you may be interested in:

PHP security filtering code (provided by 360 with high security factor) PHP filter post, get sensitive data example code php method to filter illegal and special strings php anti-injection code (filter parameters) Very useful PHP code to prevent SQL injection vulnerability filtering function An example of regular filtering using php to prevent sql injection A piece of php code to filter dangerous html



Related labels：
php实现过滤IP黑白名单的方法
source：php.cn
Previous article：Analysis of the difference between BOM and DOM Next article：Usage of fgetcsv and compatibility issues between windows and linux
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...
From 2024-04-29 11:01:01
0
3
2187
How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?
From 2024-04-23 00:22:19
0
11
2333
The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.
From 2024-04-19 15:37:47
0
1
1961
There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...
From 2024-04-18 23:52:34
0
1
1846
Where is the courseware about CSS mind mapping? Courseware
From 2024-04-16 10:10:18
0
0
1899
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template