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44 lines
1.4 KiB
44 lines
1.4 KiB
<?php
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// 数据来源：ChinaCity.db
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// 请求方式：getLoc($region, $city)
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// 返回格式：
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// {
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// "region": 省/自治区/直辖市名称
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// "city": 市/自治州名称
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// "lat": 地区纬度
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// "lon": 地区经度
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// }
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class cityDB extends SQLite3 {
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function __construct() {
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$this->open('ChinaCity.db'); // 中国省市经纬度数据库
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}
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}
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function getLoc($region, $city) { // 根据省份/城市信息查询经纬度
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$db = new cityDB;
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$data['region'] = $region;
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$data['city'] = $city;
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$query_str='SELECT * FROM main WHERE level1="'.$region.'" AND level2="'.$city.'";';
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$raw = $db->query($query_str)->fetchArray(SQLITE3_ASSOC);
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if (!$raw) { // 查无数据
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$query_str='SELECT * FROM main WHERE level1="'.$region.'" AND level2="-";'; // 尝试仅查询省份数据
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$raw = $db->query($query_str)->fetchArray(SQLITE3_ASSOC);
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if (!$raw) { // 省份错误，返回北京经纬度
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$data['lat'] = '39.91';
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$data['lon'] = '116.73';
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return $data;
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}
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if ($city == '') {
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$query_str='SELECT * FROM main WHERE level1="'.$region.'" LIMIT 1,1;'; // 获取省会记录
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$raw = $db->query($query_str)->fetchArray(SQLITE3_ASSOC);
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$data['city'] = $raw['level2'];
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}
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}
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$data['lat'] = $raw['lat'];
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$data['lon'] = $raw['lon'];
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return $data;
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}
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?>
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