get mobile gw-ip addr

gistfile1.php

<?php
/* MobileIp.php
 * 
 * usage:
 * require_once 'MobileIp.php';
 * print_r( MobileIp::get('all') );
 * print_r( MobileIp::get() );
 * print_r( MobileIp::get('docomo') );
 * print_r( MobileIp::get('au') );
 * print_r( MobileIp::get('softbank') );
 * print_r( MobileIp::get('emobile') );
 * print_r( MobileIp::get('willcom') );
 */
class MobileIp
{
  private static $_ipSrcList = array(
    'docomo' => array(
      'src'  => 'http://www.nttdocomo.co.jp/service/imode/make/content/ip/index.html',
      'reg'  => '/([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]{1,2})/i'
    ),
    'au' => array(
      'src'  => 'http://www.au.kddi.com/ezfactory/tec/spec/ezsava_ip.html',
      'reg'  => '/<td.+>([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}).+<\/td>[.\s]+<td.+>(\/[0-9]{1,2}).+<\/td>/i'
    ),
    'softbank' => array(
      'src'  => 'http://creation.mb.softbank.jp/web/web_ip.html',
      'reg'  => '/([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]{1,2})/i'
    ),
    'emobile' => array(
      'src'  => 'http://developer.emnet.ne.jp/ipaddress.html',
      'reg'  => '/([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]{1,2})/i'
    ),
    'willcom' => array(
      'src'  => 'http://www.willcom-inc.com/ja/service/contents_service/club_air_edge/for_phone/ip/index.html',
      'reg'  => '/([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]{1,2})/i'
    )
  );
  
  public static function get($key = 'all') {
    if ( strcmp($key, 'all') !== 0 && array_key_exists($key, self::$_ipSrcList) === false ) {
      return array();
    }
    
    $ret = array();
    if (strcmp($key, 'all') === 0) {
      foreach (self::$_ipSrcList as $k=>$v) {
        $src  = @file_get_contents($v['src']);
        $src  = ($src === false)? '' : $src;
        $reg  = $v['reg'];
        $ret[$key] = self::_parse($reg, $src);
      }
    } else {
      $src  = @file_get_contents(self::$_ipSrcList[$key]['src']);
      $src  = ($src === false)? '' : $src;
      $reg  = self::$_ipSrcList[$key]['reg'];
      $ret[$key] = self::_parse($reg, $src);
    }
    return $ret;
  }
  
  private static function _parse($reg, $src) {
    $ret = array();
    preg_match_all($reg, $src, $matches, PREG_SET_ORDER);
    foreach ($matches as $val) {
      $ip    = $val[1];
      $subIp = (isset($val[2]) === true) ? $val[2] : '';
      $addIp = $ip . $subIp;
      if ( in_array($addIp, $ret, true) === false ) {
        $ret[] = $addIp;
      }
    }
    //natsort($ret);
    return $ret;
  }
}