PHP creates an instance code for abnormal logon ip address detection, and an ip address instance

PHP creates an instance code for abnormal logon ip address detection, and an ip address instance

Implement database traversal through function Query

/*** Do not return the red information when logging on to a common ip Address * @ param string $ name username * @ return string */function errorIp ($ ip, $ name) {$ nowip = get_client_ip (); // checks whether the ip address and the current ip address are the same. if ($ ip = $ nowip) {// returns the same string $ str = '<font color = "blue "'. "> logon IP Address :". $ ip. "</font>";} else {// The number of IP addresses in different records $ count = M ('log ') -> where ("name = '{$ name}' AND ip = '{$ ip}'")-> count (); // if a certain number of ip addresses are exceeded, a normal ip address is returned. Otherwise, an exception is returned. if ($ count> 10) {$ str = '<font color = "blue "'. "> logon IP Address :". $ ip. "</font>";} else {$ str = '<font color = "red "'. "> abnormal IP Address :". $ ip. "</font>" ;}} return $ str ;}

Note: This function is applicable to all frameworks. get_client_ip () is a function for obtaining ip addresses.

Get_client_ip function segment:

function get_client_ip() {  if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {    $ip = getenv('HTTP_CLIENT_IP');  } elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {    $ip = getenv('HTTP_X_FORWARDED_FOR');  } elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {    $ip = getenv('REMOTE_ADDR');  } else{    $ip = $_SERVER['REMOTE_ADDR'];  }  return $ip;}

The above example code of the PHP login abnormal ip detection function is all the content that I have shared with you. I hope to give you a reference, and I hope you can provide more support for the house of friends.