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112 lines
4.3 KiB
112 lines
4.3 KiB
<?php
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/****************************************************
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* Geocode Class - Collection of geocoding Utilities
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*
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* Created By: Rick Hays
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* Date: 2011-09-12
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*
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* Revisions:
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* 2011-09-12 RLH Added "straight_line_distance"
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* 2011-09-12 RLH Added "getLatLong"
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*
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*****************************************************/
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require_once 'key.php';
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class geocode
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{
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/*******************************************************************************************************************
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* straight_line_distance - Returns Straight Line distance between two sets of (LAT/LONGS)
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*
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* @param real $lat1 - Latitude of Location #1
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* @param real $lon1 - Longitude of Location #1
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* @param real $lat2 - Latitude of Location #2
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* @param real $lon2 - Longitude of Location #2
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* @param string $unit - Unit of measure [DEFAULT = statute miles] ('K'=kilometers, 'N'=nautical miles)
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*
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* @return float - returns the distance in the desired unit of measure.
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*/
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public function straight_line_distance($lat1, $lon1, $lat2, $lon2, $unit='')
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{
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$theta = $lon1 - $lon2;
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$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
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$dist = acos($dist);
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$dist = rad2deg($dist);
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$miles = $dist * 60 * 1.1515;
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$unit = strtoupper($unit);
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if ($unit == "K") { return ($miles * 1.609344); } // Return in Kilometers
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else if ($unit == "N") { return ($miles * 0.8684); } // Return in Nautical Miles
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else { return $miles; } // Return in Miles
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}
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/*******************************************************************************************************************
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* getLatLong - Converts a string with a street address into Lat/Long coordinates using a Google call.
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*
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* @param string $address - Text address to convert.
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*
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* @return array
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*/
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public function getLatLong($address)
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{
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if (!is_string($address))die("All Addresses must be passed as a string");
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$_url = sprintf('https://maps.googleapis.com/maps/api/geocode/json?address=%s&'.API_KEY,rawurlencode($address));
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$_result = false;
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if($_result = file_get_contents($_url))
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{
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$decode = json_decode($_result,true);
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$_coords['status'] = $decode['status'];
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$_coords['lat'] = $decode['results'][0]['geometry']['location']['lat'];
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$_coords['lon'] = $decode['results'][0]['geometry']['location']['lng'];
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return $_coords;
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}else die('Nothing was returned');
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}
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/*******************************************************************************************************************
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* @param $origin
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* @param $destination
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* @param string $mode (driving, walking, bicycling)
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* @param string $units (metric, imperial)
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*
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* @return array
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* @example - https://maps.googleapis.com/maps/api/distancematrix/json?'.$this->api_key.'&origins='.rawurlencode($origin).'&destinations='.rawurlencode($destination).'&mode=driving&units=imperial&sensor=false
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*
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*/
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public function getDistance($origin, $destination, $mode='driving', $unit='imperial')
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{
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// Set defaults to test for
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$modes = array('driving', 'walking', 'bicycling');
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$units = array('metric', 'imperial');
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// Test that addresses are present
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if (!is_string($origin) || !is_string($destination))die("All Addresses must be passed as a string");
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// Test that Mode is present and of correct value
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$mode = strtolower($mode);
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if (!in_array($mode, $modes))die("Mode not correct");
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// Test that Unit is present and of correct value
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$unit = strtolower($unit);
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if (!in_array($unit, $units))die("Unit not correct");
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// Prep string for send ie(remove spaces and other objects)
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$_origin = rawurlencode($origin);
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$_destination = rawurlencode($destination);
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$_mode = rawurlencode($mode);
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$_unit = rawurlencode($unit);
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$_url = sprintf('https://maps.googleapis.com/maps/api/distancematrix/json?%s&origins=%s&destinations=%s&mode=%s&units=%s&sensor=false',API_KEY, rawurlencode($origin), rawurlencode($destination), $_mode, $_unit);
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if($_result = file_get_contents($_url))
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{
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$decode = json_decode($_result,true);
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$_dist['status'] = $decode['status'];
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$_dist['distance'] = $decode['rows'][0]['elements'][0]['distance']['text'];
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$_dist['duration'] = $decode['rows'][0]['elements'][0]['duration']['text'];
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return $_dist;
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}else die('Nothing was returned');
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}
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} // End Class GEOCODE
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