GeoIP.php

GeoIP.php

<?php
/** GeoIP.php - GeoIP API lookup interface
 * Uses the Free GeoIP API to perform lookup - http://freegeoip.net
 */

// dont double include
if ( class_exists( 'GeoIP' ) ) {
	return;
}

/**
 * GeoIP API lookup interface.
 * Uses the Free GeoIP API to perform lookup - http://freegeoip.net
 *
 * @author Zachary Scott <[email protected]>
 */
class GeoIP {
	
	// The GeoIP lookup API
	const API_URL = 'http://freegeoip.net/json/';

	public function __construct() { }

	/**
	 * Performs a GeoIP lookup for the given IP.
	 *
	 * @param $ip string The IP to perform the lookup on. If empty, will use the
	 * remote client.
	 * @return The GeoIP data, `null` if failed.
	 */
	public function lookup( $ip = null ) {

		// If no IP given, default to remote client
		if ( empty( $ip ) ) {

			$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : '';
			$ip = trim( $ip );

			// fallback to hostname
			if ( empty( $ip ) ) {

				$ip = isset( $_SERVER['REMOTE_HOST'] ) ? $_SERVER['REMOTE_HOST'] : '';
				$ip = trim( $ip );

			}
		}

		// Do GeoIP API lookup
		$http_resp = wp_safe_remote_get( self::API_URL . $ip );
		if ( is_wp_error( $http_resp ) ) {
			return false;
		}

		// Parse the response
		$json_resp = $http_resp['body'];
		$resp = json_decode( $json_resp, true );
		if ( empty( $resp ) ) {
			return false;
		}

		$result = array(
			'ip'           => isset( $resp['ip'] ) ? $resp['ip'] : $ip,
			'country'      => isset( $resp['country_name'] ) ? $resp['country_name'] : '',
			'country_code' => isset( $resp['country_code'] ) ? $resp['country_code'] : '',
			'region_code'  => isset( $resp['region_code'] ) ? $resp['region_code'] : ''
		);

		return $result;

	}
	
	/** Pings the API are returns whenther it is working or not. */
	public function ping() {
		$resp = $this->lookup( '8.8.8.8' ); // Google DNS server IP
		return ! empty( $resp );
	}

}

/** Copyright (c) 2014, 2015 <[email protected]>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */