Question

我试图将数据库（mysql）的经纬度绘制成php页面。到目前为止，我能够使用代码显示没有json的标记：

＆＃13;

<?
$dbname            ='insert mysql database name'; //Name of the database
$dbuser            ='insert mysql user name'; //Username for the db
$dbpass            ='insert mysql password'; //Password for the db
$dbserver          ='insert mysql database server address'; //Name of the mysql server
 
$dbcnx = mysql_connect ("$dbserver", "$dbuser", "$dbpass");
mysql_select_db("$dbname") or die(mysql_error());
?>
<html>
 <head>
 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
 <title>Google Map API V3 with markers</title>
 <style type="text/css">
 body { font: normal 10pt Helvetica, Arial; }
 #map { width: 350px; height: 300px; border: 0px; padding: 0px; }
 </style>
 <script src="http://maps.google.com/maps/api/js?v=3&sensor=false" type="text/javascript"></script>
 <script type="text/javascript">
 //Sample code written by August Li
 var icon = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/blue.png",
 new google.maps.Size(32, 32), new google.maps.Point(0, 0),
 new google.maps.Point(16, 32));
 var center = null;
 var map = null;
 var currentPopup;
 var bounds = new google.maps.LatLngBounds();
 function addMarker(lat, lng, info) {
 var pt = new google.maps.LatLng(lat, lng);
 bounds.extend(pt);
 var marker = new google.maps.Marker({
 position: pt,
 icon: icon,
 map: map
 });
 var popup = new google.maps.InfoWindow({
 content: info,
 maxWidth: 300
 });
 google.maps.event.addListener(marker, "click", function() {
 if (currentPopup != null) {
 currentPopup.close();
 currentPopup = null;
 }
 popup.open(map, marker);
 currentPopup = popup;
 });
 google.maps.event.addListener(popup, "closeclick", function() {
 map.panTo(center);
 currentPopup = null;
 });
 }
 function initMap() {
 map = new google.maps.Map(document.getElementById("map"), {
 center: new google.maps.LatLng(0, 0),
 zoom: 14,
 mapTypeId: google.maps.MapTypeId.ROADMAP,
 mapTypeControl: false,
 mapTypeControlOptions: {
 style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR
 },
 navigationControl: true,
 navigationControlOptions: {
 style: google.maps.NavigationControlStyle.SMALL
 }
 });
 <?
 $query = mysql_query("SELECT * FROM poi_example");
 while ($row = mysql_fetch_array($query)){
 $name=$row['name'];
 $lat=$row['lat'];
 $lon=$row['lon'];
 $desc=$row['desc'];
 echo ("addMarker($lat, $lon,'<b>$name</b><br/>$desc');\n");
 }
 ?>
 center = bounds.getCenter();
 map.fitBounds(bounds);
 
 }
 </script>
 </head>
 <body onload="initMap()" style="margin:0px; border:0px; padding:0px;">
 <div id="map"></div>
 </html>

＆＃13;

因此我尝试使用json但是它没有显示下面的任何内容是我尝试过的代码：

＆＃13;

<?
$dbname            ='insert mysql database name'; //Name of the database
$dbuser            ='insert mysql user name'; //Username for the db
$dbpass            ='insert mysql password'; //Password for the db
$dbserver          ='insert mysql database server address'; //Name of the mysql server

$dbcnx = mysql_connect ("$dbserver", "$dbuser", "$dbpass");
mysql_select_db("$dbname") or die(mysql_error());
?>
<html>
 <head>
 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
 <title>Google Map API V3 with markers</title>
 <style type="text/css">
 body { font: normal 10pt Helvetica, Arial; }
 #map { width: 350px; height: 300px; border: 0px; padding: 0px; }
 </style>
 <script src="http://maps.google.com/maps/api/js?v=3&sensor=false" type="text/javascript"></script>
 <script type="text/javascript">
 //Sample code written by August Li
 var icon = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/blue.png",
 new google.maps.Size(32, 32), new google.maps.Point(0, 0),
 new google.maps.Point(16, 32));
 var center = null;
 var map = null;
 var currentPopup;
 var bounds = new google.maps.LatLngBounds();
 function addMarker(lat, lng, info) {
 var pt = new google.maps.LatLng(lat, lng);
 bounds.extend(pt);
 var marker = new google.maps.Marker({
 position: pt,
 icon: icon,
 map: map
 });
 var popup = new google.maps.InfoWindow({
 content: info,
 maxWidth: 300
 });
 google.maps.event.addListener(marker, "click", function() {
 if (currentPopup != null) {
 currentPopup.close();
 currentPopup = null;
 }
 popup.open(map, marker);
 currentPopup = popup;
 });
 google.maps.event.addListener(popup, "closeclick", function() {
 map.panTo(center);
 currentPopup = null;
 });
 }
 function initMap() {
 map = new google.maps.Map(document.getElementById("map"), {
 center: new google.maps.LatLng(0, 0),
 zoom: 14,
 mapTypeId: google.maps.MapTypeId.ROADMAP,
 mapTypeControl: false,
 mapTypeControlOptions: {
 style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR
 },
 navigationControl: true,
 navigationControlOptions: {
 style: google.maps.NavigationControlStyle.SMALL
 }
 });
 

 <?
 $query = mysql_query("SELECT * FROM poi_example");
 while ($row = mysql_fetch_array($query)){
 $name=$row['name'];
 $lat=$row['lat'];
 $lon=$row['lon'];
 $desc=$row['desc'];
$latlong = $lat.", ". $lon;
array_push($new, $latlong);
 //echo ("addMarker($lat, $lon,'<b>$name</b><br/>$desc');\n");
 }
   echo json_encode($new);

 ?>

 var arr = <?php echo json_encode($new) ?>;
for(var i=0; i<arr.length;i++)
{
    var lat = Number(arr[i].split(",")[0].trim());
    var lon = Number(arr[i].split(",")[0].trim());
    var four = new google.maps.LatLng(lat,lon);
    var marker=new google.maps.Marker({
                position:four,
                map:map
            });
}
 center = bounds.getCenter();
 map.fitBounds(bounds);

 }
 </script>
 </head>
 <body onload="initMap()" style="margin:0px; border:0px; padding:0px;">
 <div id="map"></div>
 </html>

＆＃13;

Answer 1

我坚信你应该在两端分开你的逻辑。

您的PHP逻辑。当你自己的Frontend Logic JS工作时，它可以独立工作。这样就可以更容易地解决问题并解决问题。

以下是我认为您应该关注的解决方案。我没有你的数据库。希望你明白我建议你应该做些什么才能让它发挥作用。

第1步

PHP代码 - PHP文件 - yourphpfile.php

<?php
$dbname            ='u769748933_tr'; //Name of the database
$dbuser            ='u769748933_ta'; //Username for the db
$dbpass            ='adamas'; //Password for the db
$dbserver          ='mysql.1freehosting.com'; //Name of the mysql server

$dbcnx = mysql_connect ("$dbserver", "$dbuser", "$dbpass");
mysql_select_db("$dbname") or die(mysql_error());

 $q = mysql_("SELECT * FROM poi_example");
 while ($row = mysql_fetch_array($q)){
 $name=$row['name'];
 $lat=$row['lat'];
 $lon=$row['lon'];
 $desc=$row['desc'];
$latlong = $lat.", ". $lon;
array_push($new, $latlong);

 }

   echo $new; // raw data, not json encoded


?>

上面的代码应该在您的浏览器上指向它时显示您的JSON编码数据。

第2步

您的Javascript文件

mymap.js文件

     //Sample code written by August Li
 var icon = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/blue.png",
 new google.maps.Size(32, 32), new google.maps.Point(0, 0),
 new google.maps.Point(16, 32));
 var center = null;
 var map = null;
 var currentPopup;
 var bounds = new google.maps.LatLngBounds();
 function addMarker(lat, lng, info) {
 var pt = new google.maps.LatLng(lat, lng);
 bounds.extend(pt);
 var marker = new google.maps.Marker({
 position: pt,
 icon: icon,
 map: map
 });
 var popup = new google.maps.InfoWindow({
 content: info,
 maxWidth: 300
 });
 google.maps.event.addListener(marker, "click", function() {
 if (currentPopup != null) {
 currentPopup.close();
 currentPopup = null;
 }
 popup.open(map, marker);
 currentPopup = popup;
 });
 google.maps.event.addListener(popup, "closeclick", function() {
 map.panTo(center);
 currentPopup = null;
 });
 }
 function initMap() {
 map = new google.maps.Map(document.getElementById("map"), {
 center: new google.maps.LatLng(0, 0),
 zoom: 14,
 mapTypeId: google.maps.MapTypeId.ROADMAP,
 mapTypeControl: false,
 mapTypeControlOptions: {
 style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR
 },
 navigationControl: true,
 navigationControlOptions: {
 style: google.maps.NavigationControlStyle.SMALL
 }
 });

 var arr = 'youphpfile.php';// or url
for(var i=0; i<arr.length;i++)
{
    var lat = Number(arr[i].split(",")[0].trim());
    var lon = Number(arr[i].split(",")[0].trim());
    var four = new google.maps.LatLng(lat,lon);
    var marker=new google.maps.Marker({
                position:four,
                map:map
            });
}
 center = bounds.getCenter();
 map.fitBounds(bounds);

 }

第3步 HTML文件。

<html>
 <head>
 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
 <title>Google Map API V3 with markers</title>
 <style type="text/css">
 body { font: normal 10pt Helvetica, Arial; }
 #map { width: 350px; height: 300px; border: 0px; padding: 0px; }
 </style>
 <script src="http://maps.google.com/maps/api/js?v=3&sensor=false" type="text/javascript"></script>
<script src="mymap.js"></script>
</head>
 <body onload="initMap()" style="margin:0px; border:0px; padding:0px;">
 <div id="map"></div>
 </html>

看看我建议你做什么。您不需要对PHP文件中的数据进行编码。然后，接下来，您将数据输入JS结尾。

我希望这会有所帮助。

使用json从数据库检索纬度经度到php页面

1 个答案: