【发布时间】：2011-11-05 04:35:27
【问题描述】：
我想知道是否有人可以帮助我。
我正在使用以下代码片段成功地在 mySQL 数据库中保存的特定位置显示地图标记。
PHP 代码
<?php
require("phpfile.php");
// Start XML file, create parent node
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
// Opens a connection to a MySQL server
$connection=mysql_connect ("hostname", $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 locationid, detectorid, searchheadid FROM finds WHERE `locationid` = '43'";
$result = mysql_query($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 = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("locationid",$row['locationid']);
$newnode->setAttribute("detectorid",$row['detectorid']);
$newnode->setAttribute("searchheadid",$row['searchheadid']);
}
echo $dom->saveXML();
?>
HTML 代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Location</title>
<link rel="stylesheet" href="css/findsperlocationstyle.css" type="text/css" media="all" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&language=en"></script>
<script type="text/javascript">
var customIcons = {
Artefact: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
Coin: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_green.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
Jewellery: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_yellow.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
// Creating a LatLngBounds object
var bounds = new google.maps.LatLngBounds();
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom:14,
mapTypeId: 'satellite'
});
// Change this depending on the name of your PHP file
downloadUrl("phpfile.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var locationid = markers[i].getAttribute("locationid");
var detectorid = markers[i].getAttribute("detectorid");
var searchheadid= markers[i].getAttribute("searchheadid");
var icon = customIcons[findcategory] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
title: 'Click to view details',
icon: icon.icon,
shadow: icon.shadow,
formdetectorid: detectorid,
formsearchheadid: searchheadid,
});
bounds.extend(point);
map.fitBounds(bounds);
google.maps.event.addListener(marker, "click", function() {
document.getElementById('detectorid').value = this.formdetectorid;
document.getElementById('searchheadid').value = this.formsearchheadid;
});
}
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<form name="findsperlocation" id="findsperlocation">
<p align="left"><label>Location id<br />
</label>
</p>
<div>
<div align="left">
<input name="locationid" type="text" id="locationid" value="43" readonly="readonly"/>
</div>
</div>
<p align="left"><label>Detector Used</label> </p>
<div>
<div align="left">
<input name="detectorid" type="text" id="detectorid" size="30" maxlength="30"/>
</div>
</div>
<p align="left"><label>Search Head Used</label> </p>
<div>
<div align="left">
<input name="searchheadid" type="text" id="searchheadid" size="30" maxlength="30"/>
</div>
</div>
</form>
<div id="map"></div>
</body>
</html>
我遇到的问题涉及我的两个字段，“detectorid”和“searchheadid”。这些字段的信息通过另一个表单上的两个下拉菜单保存。下拉菜单显示适当的文本值供用户选择，但与每个选择关联的“id”值保存到上述代码段中使用的表中。
如果可能的话，我希望能够做的不是以这种形式显示“id”值，而是将其转换回适当的文本值。文本值保存在两个单独的表中，“检测器”和“搜索头”，但我必须承认，我真的不知道从哪里开始。
我只是想知道是否有可能有人可以告诉我我需要做什么来显示这些信息。
非常感谢和亲切的问候
克里斯
【问题讨论】：
标签： php javascript google-maps-markers