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Detect City by IP function

/ Published in: PHP
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This will take an IP and try to find the city.

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  1. function detect_city($ip) {
  2.  
  3.         $default = 'UNKNOWN';
  4.  
  5.         if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost')
  6.             $ip = '8.8.8.8';
  7.  
  8.         $curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)';
  9.  
  10.         $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip);
  11.         $ch = curl_init();
  12.  
  13.         $curl_opt = array(
  14.             CURLOPT_FOLLOWLOCATION  => 1,
  15.             CURLOPT_HEADER      => 0,
  16.             CURLOPT_RETURNTRANSFER  => 1,
  17.             CURLOPT_USERAGENT   => $curlopt_useragent,
  18.             CURLOPT_URL       => $url,
  19.             CURLOPT_TIMEOUT         => 1,
  20.             CURLOPT_REFERER         => 'http://' . $_SERVER['HTTP_HOST'],
  21.         );
  22.  
  23.         curl_setopt_array($ch, $curl_opt);
  24.  
  25.         $content = curl_exec($ch);
  26.  
  27.         if (!is_null($curl_info)) {
  28.             $curl_info = curl_getinfo($ch);
  29.         }
  30.  
  31.         curl_close($ch);
  32.  
  33.         if ( preg_match('{<li>City : ([^<]*)</li>}i', $content, $regs) )  {
  34.             $city = $regs[1];
  35.         }
  36.         if ( preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs) )  {
  37.             $state = $regs[1];
  38.         }
  39.  
  40.         if( $city!='' && $state!='' ){
  41.           $location = $city . ', ' . $state;
  42.           return $location;
  43.         }else{
  44.           return $default;
  45.         }
  46.  
  47.     }

URL: http://www.catswhocode.com/blog/useful-php-code-snippets-and-functions

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