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过去几天我一直在玩Google Maps API。由于缺乏PHP技能,我陷入了困境。下面运行的PHP代码后,返回的XML是:使用Google Maps API检查XML
<?xml version="1.0"?>
<markers/>
我与玩耍的代码是:http://code.google.com/apis/maps/articles/phpsqlsearch.html
我使用Dreamweaver来处理这个项目。如果有通过PHP代码进行调试的好方法,我会非常感激。我试着用Google搜索,但我不确定什么是最适合PHP新手的。 我检查了我的数据库中有记录的半径。它们都在我正在测试的坐标50英里内。
的PHP代码是:提前
<?php
require("phpsqlsearch_dbinfo.php");
// Start XML file, create parent node
$doc = new DOMDocument("1.0");
$node = $doc->createElement("markers");
$parnode = $doc->appendChild($node);
// 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 user, latitude, longitude, (3959 * acos(cos(radians('%s')) * cos(radians(latitude)) * cos(radians(longitude) - radians('%s')) + sin(radians('%s')) * sin(radians(latitude)))) AS distance FROM tbl_UserLatLng HAVING distance < '%s' ORDER BY distance LIMIT 0 , 20";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
// Iterate through the rows, adding XML nodes for each
while ($row = @mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
$node = $doc->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->set_attribute("user", $row['user']);
$newnode->set_attribute("latitude", $row['latitude']);
$newnode->set_attribute("longitude", $row['longitude']);
$newnode->set_Attribute("distance", $row['distance']);
}
echo $doc->saveXML();
?>
谢谢!
你绝对正确,但我不确定Having子句不起作用的原因。我不确定%s代表什么。从我抬头看,它将任何数字/浮点数转换为一个字符串。 – JK0124
如果你想要做字符串替换,如下所示:$ query = sprintf(“Select bla bla%s”,myvalueToReplace) –