內容簡介
一款可以為 WP_Query 添加位置感知地理搜索功能的外掛程式。
可用於開發位置感知型應用程序，例如向用戶顯示其周圍的結果。
🔎 在查詢中使用
將“geo_query”參數添加到 WP_Query 中，將在返回的結果中添加一列“距離”，前提是它們具有正確的元數據，然後您可以在模板中顯示此內容。
您可以使用位置搜索參數，它將進行地理編碼或直接提供緯度和經度值：
$query = new WP_Query(array(
"geo_query" => array(
"location" => "倫敦"
)
))
$query = new WP_Query(array(
"geo_query" => array(
"latitude" => -52.005,
"longitude" => 0.005,
)
))
您還可以選擇性地按搜索半徑過濾。
預設情況下，距離以英里為單位，如果您需要公里，可以提供“units”=>“km” 。
$query = new WP_Query(array(
"geo_query" => array(
"latitude" => -52.005,
"longitude" => 0.005,
"radius" => 10
)
))
或按接近程度排序：
$query = new WP_Query(array(
"geo_query" => array(
"latitude" => -52.005,
"longitude" => 0.005
),
"orderby" => "geo"
))
顯示模板中的距離
在包含geo_query的 WP_Query 循環中,您可以使用兩個額外的函數顯示相應距離：
jhgs_get_the_distance(object $post) –返回距離的四捨五入整數，類似於get_the_title()
jhgs_the_distance(string $less_than_one, string $one, string $more_than_one) – 顯示一個大約以人類能讀的字符串, 類似於the_title()
jhgs_the_distance將根據捨棄後的距離顯示三條消息中的其中一個。
默認情況下，它們為：
“不到一英里的距離”
“大約一英里的距離”
“大約 %s 英里之遙”
如果您需要使用不同的單位或翻譯，可以將三個printf格式的字符串傳遞給jhgs_the_distance()，以覆蓋這些消息。在此，您將%s放在所需值的位置。
如果您需要精確的未捨棄的數據，可以使用$post->distance。
地理編碼
使用Nominatim服務對位置搜索進行地理編碼。
使用它取決於一個可接受的使用策略--如果您的用例涉及大量的 API 調用，應該將它替換為付費方案，例如 Google 的。
📍 填充緯度和經度數據
尋找文章上鍵為“latitude”和“longitude”的兩個自訂字段值。
對於如何提供此類數據，他是不持有任何偏見的，最簡單的方法是直接在文本編輯器中輸入。
外掛標籤
開發者團隊
原文外掛簡介
A plugin to add location-aware geographical search to WP_Query.
You can use it to power location-aware apps, such as showing a user results near them.
🔎 Using it in a query
Adding a geo_query parameter to WP_Query will add a “distance” column to the returned results, provided they have the right metadata.
You can then display this in your templates.
You can use a location search parameter, which will be geocoded or directly provide latitude and longitude values:
$query = new WP_Query(array(
"geo_query" => array(
"location" => "London"
)
))
$query = new WP_Query(array(
"geo_query" => array(
"latitude" => -52.005,
"longitude" => 0.005,
)
))
Optionally, you can then filter by search radius.
By default, distances are given in miles. You can provide "units" => "km" if you need kilometres.
$query = new WP_Query(array(
"geo_query" => array(
"latitude" => -52.005,
"longitude" => 0.005,
"radius" => 10
)
))
Or order by nearness:
$query = new WP_Query(array(
"geo_query" => array(
"latitude" => -52.005,
"longitude" => 0.005
),
"orderby" => "geo"
))
Displaying distance in templates
In a WP_Query loop that includes a geo_query, you can use two extra functions to show distance away:
jhgs_get_the_distance(object $post) – which returns a rounded integer for the distance away, similar to get_the_title()
jhgs_the_distance(string $less_than_one, string $one, string $more_than_one) – which displays an approximate human-readable string, similar to the_title()
jhgs_the_distance will show one of three messages depending on whether the rounded distance is less than one, one, or greater than one. By default these are:
“Less than a mile away”
“About a mile away”
“About %s miles away”
If you need to use different units or translations, can pass three printf-formatted strings to jhgs_the_distance() to override these messages. Put %s where you want the value.
If you need the exact, unrounded value, you can use $post->distance.
Geocoding
Nominatim‘s service is used for geocoding location searches.
Using it is subject to an acceptable use policy – if you use case will involve lots of API calls, you should replace it with a paid alternative, like Google‘s.
📍 Populating latitude and longitude data
It looks for two custom field values with the keys latitude and longitude on your posts.
It’s agnostic about how you supply this data. The simplest thing to do is type it in using WordPress’s built-in custom field editor.
You could also hook into the save_post action to populate meta whenever you create or change a post, by adding a snippet like this to your theme’s functions.php:
function example_update_latlngs($post){
$location = get_field("location", $post);
if(isset($location)){
update_post_meta($post, "longitude", $location["lng"]);
update_post_meta($post, "latitude", $location["lat"]);
}
}
add_action("save_post", "example_update_latlngs", 10, 3);
This example assumes you are using an ACF Google Map field called “location”, but the data could come from anywhere, including a custom meta box you code yourself, so long as the post meta keys are right.
Bulk-updating existing posts
If you have many posts that you need to add longitude and latitude meta to in bulk, you could add something like this to functions.php, which will run on theme activation:
function example_update_all_latlngs(){
$query = new WP_Query(array(
"posts_per_page" => -1
));
foreach($query->get_posts() as $post){
// Function from above
example_update_latlngs($post);
}
}
add_action('after_switch_theme', 'example_update_all_latlngs');
