ejemplo de código php de integración api de google maps

Ejemplo: PHP-Google Map Api

/**
 * @function getDistance()
 * Calculates the distance between two address
 * 
 * @params
 * $addressFrom - Starting point
 * $addressTo - End point
 * $unit - Unit type
 * 
 * @author CodexWorld
 * @url https://www.codexworld.com
 *
 */functiongetDistance($addressFrom,$addressTo,$unit='')// Google API key$apiKey='Your_Google_API_Key';// Change address format$formattedAddrFrom=str_replace(' ','+',$addressFrom);$formattedAddrTo=str_replace(' ','+',$addressTo);// Geocoding API request with start address$geocodeFrom=file_get_contents('https://maps.googleapis.com/maps/api/geocode/json?address='.$formattedAddrFrom.'&sensor=false&key='.$apiKey);$outputFrom=json_decode($geocodeFrom);if(!empty($outputFrom->error_message))return$outputFrom->error_message;// Geocoding API request with end address$geocodeTo=file_get_contents('https://maps.googleapis.com/maps/api/geocode/json?address='.$formattedAddrTo.'&sensor=false&key='.$apiKey);$outputTo=json_decode($geocodeTo);if(!empty($outputTo->error_message))return$outputTo->error_message;// Get latitude and longitude from the geodata$latitudeFrom=$outputFrom->results[0]->geometry->location->lat;$longitudeFrom=$outputFrom->results[0]->geometry->location->lng;$latitudeTo=$outputTo->results[0]->geometry->location->lat;$longitudeTo=$outputTo->results[0]->geometry->location->lng;// Calculate distance between latitude and longitude$theta=$longitudeFrom-$longitudeTo;$dist=sin(deg2rad($latitudeFrom))*sin(deg2rad($latitudeTo))+cos(deg2rad($latitudeFrom))*cos(deg2rad($latitudeTo))*cos(deg2rad($theta));$dist=acos($dist);$dist=rad2deg($dist);$miles=$dist*60*1.1515;// Convert unit and return distance$unit=strtoupper($unit);if($unit=="K")returnround($miles*1.609344,2).' km';elseif($unit=="M")returnround($miles*1609.344,2).' meters';elsereturnround($miles,2).' miles';

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