PHP性状的使用

<?php
trait Geocodable{
    /** @var string */
    protected $address;
    
    /** @var GeocoderGeocoder */ 
    protected $geocoder;
    
    /** @var GeocoderResultGeocoded */
    protected $geocoderResult;
    
    public function setGeocoder(GeoCoderGeocoderInterface $gocoder)
    {
        $this->geocoder = $gocoder;
    }
    
    public function setAddress($address)
    {
        $this->address = $address;
    }
    
    public function getLatitude()
    {
        if (isset($this->geocoderResult) == false){
            $this->geocodeAddress();
        }
        
        return $this->geocoderResult->getLatitude();
    }
    
    public function getLongitude()
    {
        if (isset($this->geocoderResult) === false){
            $this->geocodeAddress();
        }
        
        return $this->geocoderResult->getLongitude();
    }
    
    protected function geocodeAddress()
    {
        $this->geocoderResult = $this->geocoder->geocode($this->address);
        
        return true;
    }
}

//使用性状
class RetailStore
{
    use Geocodable;
    
    
    //这里是类的实现
}


$geocoderAdapter = new GeocoderHttpAdapterCurlHttpAdapter();
$geocoderProvider = new GeocoderProviderGoogleMapsProvider($geocoderAdapter);
$geocoder = new GeocoderGeocoder($geocoderProvider);

$store = new RetailStore();
$store->setAddress('420 9th Avenue, New York, NY 10001 USA');
$store->setGeocoder($gocoder);

$latitude = $store->getLatitude();
$longitude = $store->getLongitude();
 echo $latitude, ':', $longitude;