Example of PHP making login exception IP detection function

This article mainly introduces PHP production login exception IP detection Function example, interested in the friend's reference, I hope to help you.

Querying database traversal implementations using functions

/** * Do not return understandriginally information on a common IP address * @param string $IP  IP Address * @param string $name  username * @return String */function errorip ($ip, $name) {  $nowip = Get_client_ip ();  To determine whether the IP and current IP are the same, the query database compares  if ($ip = = $nowip) {    //the same direct return string    $str = ' <font color= ' Blue '. " > Login IP: ". $ip." </font> ";  } else{    //Different count this number of IP addresses    $count =  M (' log ')->where ("Name= ' {$name} ' and ip= ' {$ip} ')->count ();    If more than a certain number is normal IP otherwise returns the string    if ($count >) {      $str = ' <font color= ' blue '. ' > Login IP: ". $ip." </font> ";    } else{      $str = ' <font color= ' red '. ' > Exception IP: ". $ip." </font> ";    }  }  return $STR;}

Note: Suitable for all frames, get_client_ip () is an IP get function.

Get_client_ip function Fragment:

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;}

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