Simple php geohash class
You may install Geohash with Composer (recommended) or manually.
require: {
"geohash/geohash": "dev-master"
}
Encode a coordinates:
<?php
require "vendor/autoload.php";
use Geohash\Geohash;
echo Geohash::encode(31.283131, 121.500831); // wtw3uyfjqw61
Decode a geohash:
<?php
require "vendor/autoload.php";
use Geohash\Geohash;
list($lat, $lng) = Geohash::decode('wtw3uyfjqw61');
echo $lat, ', ', $lng; // 31.283131, 121.500831