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我有一个包含数百个公司简介的 wordpress 网站。每家公司都有一个地址,当有人访问他们的个人资料时,该地址会被地理编码。目前这是地址获取地理编码的唯一方式,因此如果没有人访问该页面,则地址不会被地理编码。

这也产生了另一个问题,每次有人访问该页面时,它都会对地址进行地理编码!

我需要想出一种方法,为每家公司触发一次地理编码,但不必访问该页面。

有什么办法可以做到这一点?

更新:

这是当您访问公司简介(即地理编码)时触发的脚本。因此,对于 300 家公司,您需要访问所有 300 个页面才能对它们进行地理编码!

<?php 

require("database.php");
// Opens a connection to a MySQL server
$con = mysql_connect("localhost", $username, $password);

if (!$con)
{
    die('Could not connect: ' . mysql_error());
}

mysql_select_db("medicom_wp", $con);


    $company = get_field('company_name');
    $address = get_field('address');
    $city = get_field('city');
    $post_code = get_field('post_code');

    $sql = sprintf("select count('x') as cnt from markers where `name` = '%s'", mysql_real_escape_string($company));
    $row_dup = mysql_fetch_assoc(mysql_query($sql,$con));
    if ($row_dup['cnt'] == 0) {
        mysql_query("INSERT INTO markers (`name`, `address`, `lat`, `lng`, `type`) VALUES ('".$company."', '".$address.", ".$city.", ".$post_code."', '0.0', '0.0', '')");
}
wp_reset_query();


define("MAPS_HOST", "maps.google.com");
define("KEY", "");

// Opens a connection to a MySQL server
$connection = mysql_connect("localhost", $username, $password);
if (!$connection) {
  die("Not connected : " . mysql_error());
}

// Set the active MySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
  die("Can\'t use db : " . mysql_error());
}

// Select all the rows in the markers table
$query = "SELECT * FROM markers WHERE 1";
$result = mysql_query($query);
if (!$result) {
  die("Invalid query: " . mysql_error());
}

// Initialize delay in geocode speed
$delay = 0;
$base_url = "http://" . MAPS_HOST . "/maps/geo?output=xml" . "&key=" . KEY;

// Iterate through the rows, geocoding each address
while ($row = @mysql_fetch_assoc($result)) {
  $geocode_pending = true;

  while ($geocode_pending) {
    $address = $row["address"];
    $id = $row["id"];
    $request_url = $base_url . "&q=" . urlencode($address);
    $xml = simplexml_load_file($request_url) or die("url not loading");

    $status = $xml->Response->Status->code;
    if (strcmp($status, "200") == 0) {
      // Successful geocode
      $geocode_pending = false;
      $coordinates = $xml->Response->Placemark->Point->coordinates;
      $coordinatesSplit = split(",", $coordinates);
      // Format: Longitude, Latitude, Altitude
      $lat = $coordinatesSplit[1];
      $lng = $coordinatesSplit[0];

      $query = sprintf("UPDATE markers " .
             " SET lat = '%s', lng = '%s' " .
             " WHERE id = '%s' LIMIT 1;",
             mysql_real_escape_string($lat),
             mysql_real_escape_string($lng),
             mysql_real_escape_string($id));
      $update_result = mysql_query($query);
      if (!$update_result) {
        die("Invalid query: " . mysql_error());
      }
    } else if (strcmp($status, "620") == 0) {
      // sent geocodes too fast
      $delay += 1000;
    } else {
      // failure to geocode
      $geocode_pending = false;
      echo "Address " . $address . " failed to geocoded. ";
      echo "Received status " . $status . "
\n";
    }
    usleep($delay);
  }
}


?>
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1 回答 1

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假设你在服务器上做地理编码,那么为了解决每次查找数据的问题,只需缓存结果即可。

然后,您的逻辑将类似于:

if geocode in database
    get data from database
else
    get data from geocode lookup
    store data in database    
return data

如果您真的想避免按需执行(即甚至不是第一次),那么当您保存页面时,请执行我在“其他”中所做的操作。

于 2012-06-21T09:52:23.717 回答