将变量从 html 传递到 javascript 再到 php
Passing variables from html to javascript to php
我正在尝试对用户提交的地址进行地理编码并将其存储到数据库中。该表单调用 php 文件,其中 javascript 检索地址并对其进行地理编码。然后将 lat 和 lng 值传递给 php 并存储在数据库中,但是数据库中的唯一值是零。
HTML 文件:
<html>
<body>
<form action="registerEvent.php" id="form" method="post">
<input id="address" name="address" placeholder="Adrese" type="text">
<button type="submit" id="submit">Send</button>
</form>
</body>
</html>
registerEvent.php:
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true"></script>
<script>
var geocoder;
var inputLat;
var inputLng;
function codeAddress() {
geocoder = new google.maps.Geocoder();
var address = document.getElementById('address').value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var inputLat = event.latLng.lat();
var inputLng = event.latLng.lng();
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
function passvariable() {
window.location.href = "registerEvent.php?lat=" + inputLat;
window.location.href = "registerEvent.php?lng=" + inputLng;
}
codeAddress();
passvariable();
</script>
<?php
require("dbinfo.php");
$connection=mysqli_connect ('localhost', $username, $password);
if (!$connection) {
die('Not connected : ' . mysql_error());
}
$db_selected = mysqli_select_db($connection, $database);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
$lat =$_GET['inputLat'];
$lng =$_GET['inputLng'];
$sql = "INSERT INTO sometable (lat, lng)
VALUES ('$lat', '$lng')";
if (!mysqli_query($connection,$sql)) {
die('Error: ' . mysqli_error($connection));
};
mysqli_close($connection);
?>
您调用了 window.location.href
两次,PHP 部分的变量似乎不正确($_GET['inputLat']
而不是 lat
,$_GET['inputLong']
而不是 lon
)
如果HTML文件是一个单独的文件,那么你需要用不同的方式获取地址:
替换
var address = document.getElementById('address').value;
和
var address = "<?php echo $_POST['address']; ?>"
JS 函数应该看起来更像这样
<script src="https://maps.googleapis.com/maps/api/jsv=3.exp&signed_in=true">
</script>
<script>
var geocoder;
var inputLat;
var inputLng;
function codeAddress() {
geocoder = new google.maps.Geocoder();
var address = document.getElementById('address').value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var inputLat = event.latLng.lat();
var inputLng = event.latLng.lng();
window.location.href = "registerEvent.php?lat=" + inputLat + "&lng=" + inputLng;
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
codeAddress();
</script>
和 PHP 部分:
// ...
$lat =$_GET['lat'];
$lng =$_GET['lng'];
if (!empty($lat) && !empty($lng)) {
$sql = "INSERT INTO sometable (lat, lng) VALUES ('$lat', '$lng')";
if (!mysqli_query($connection,$sql)) {
die('Error: ' . mysqli_error($connection));
};
}
mysqli_close($connection);
如果所有内容都在同一个文件中,则表单按钮应更改为如下所示:
<button type="button" id="submit" onclick="codeAddress()">Send</button>
有一次,A 使用此代码段从一个地址获取 lat/lng,全部在 PHP(旧 API)中:
$address = "......";
$json = file_get_contents("http://maps.googleapis.com/maps/api/geocode/json?sensor=false&address=".urlencode($address));
$json = json_decode($json);
if ($json->status == "OK")
return $json->results[0]->geometry->location;
javascript 正在寻找一个值
var address = document.getElementById('address').value;
在 html 输入中没有值:
<input id="address" name="address" placeholder="Adrese" type="text">
在您的代码中,表单对 PHP 页面执行 POST
但您 post 只有地址字段而没有从 google api.
加上您调用的 API 给出了一个复杂的 return 类型,您应该检查它...要获得纬度和经度,您必须从数组中选择一个元素并检查 return 中的内容=13=]...(您可以检查:https://developers.google.com/maps/documentation/javascript/reference#GeocoderResult)
因此,首先,在 post 表单之前进行 ajax 调用以获取坐标。
只需添加 onsubmit="return codeAddress();"
然后在您的 codeAddress 函数中添加一个 return false;
以防止默认操作(防止提交表单本身)并通过 GET 等函数将数据发送到 registerEvent.php这个。
在你的HTML中:
<html>
<head>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true"></script>
<script type="text/javascript">
function codeAddress() {
var geocoder = new google.maps.Geocoder();
var address = document.getElementById('address').value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var inputLat = results[0].geometry.location.lat();
var inputLng = results[0].geometry.location.lng();
window.location.href = "registerEvent.php?inputLat=" + inputLat + "&inputLng=" + inputLng;
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
return false;
}
</script>
</head>
<body>
<form action="registerEvent.php" id="form" method="post" onsubmit="return codeAddress()">
<input id="address" name="address" placeholder="Adrese" type="text">
<button type="submit" id="submit">Send</button>
</form>
</body>
</html>
在你的PHP中:
<?php
require("dbinfo.php");
$connection=mysqli_connect ('localhost', $username, $password);
if (!$connection) {
die('Not connected : ' . mysql_error());
}
$db_selected = mysqli_select_db($connection, $database);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
$lat =$_GET['inputLat'];
$lng =$_GET['inputLng'];
$sql = "INSERT INTO sometable (lat, lng) VALUES ('$lat', '$lng')";
if (!mysqli_query($connection,$sql)) {
die('Error: ' . mysqli_error($connection));
};
mysqli_close($connection);
?>
我正在尝试对用户提交的地址进行地理编码并将其存储到数据库中。该表单调用 php 文件,其中 javascript 检索地址并对其进行地理编码。然后将 lat 和 lng 值传递给 php 并存储在数据库中,但是数据库中的唯一值是零。
HTML 文件:
<html>
<body>
<form action="registerEvent.php" id="form" method="post">
<input id="address" name="address" placeholder="Adrese" type="text">
<button type="submit" id="submit">Send</button>
</form>
</body>
</html>
registerEvent.php:
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true"></script>
<script>
var geocoder;
var inputLat;
var inputLng;
function codeAddress() {
geocoder = new google.maps.Geocoder();
var address = document.getElementById('address').value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var inputLat = event.latLng.lat();
var inputLng = event.latLng.lng();
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
function passvariable() {
window.location.href = "registerEvent.php?lat=" + inputLat;
window.location.href = "registerEvent.php?lng=" + inputLng;
}
codeAddress();
passvariable();
</script>
<?php
require("dbinfo.php");
$connection=mysqli_connect ('localhost', $username, $password);
if (!$connection) {
die('Not connected : ' . mysql_error());
}
$db_selected = mysqli_select_db($connection, $database);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
$lat =$_GET['inputLat'];
$lng =$_GET['inputLng'];
$sql = "INSERT INTO sometable (lat, lng)
VALUES ('$lat', '$lng')";
if (!mysqli_query($connection,$sql)) {
die('Error: ' . mysqli_error($connection));
};
mysqli_close($connection);
?>
您调用了 window.location.href
两次,PHP 部分的变量似乎不正确($_GET['inputLat']
而不是 lat
,$_GET['inputLong']
而不是 lon
)
如果HTML文件是一个单独的文件,那么你需要用不同的方式获取地址: 替换
var address = document.getElementById('address').value;
和
var address = "<?php echo $_POST['address']; ?>"
JS 函数应该看起来更像这样
<script src="https://maps.googleapis.com/maps/api/jsv=3.exp&signed_in=true">
</script>
<script>
var geocoder;
var inputLat;
var inputLng;
function codeAddress() {
geocoder = new google.maps.Geocoder();
var address = document.getElementById('address').value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var inputLat = event.latLng.lat();
var inputLng = event.latLng.lng();
window.location.href = "registerEvent.php?lat=" + inputLat + "&lng=" + inputLng;
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
codeAddress();
</script>
和 PHP 部分:
// ...
$lat =$_GET['lat'];
$lng =$_GET['lng'];
if (!empty($lat) && !empty($lng)) {
$sql = "INSERT INTO sometable (lat, lng) VALUES ('$lat', '$lng')";
if (!mysqli_query($connection,$sql)) {
die('Error: ' . mysqli_error($connection));
};
}
mysqli_close($connection);
如果所有内容都在同一个文件中,则表单按钮应更改为如下所示:
<button type="button" id="submit" onclick="codeAddress()">Send</button>
有一次,A 使用此代码段从一个地址获取 lat/lng,全部在 PHP(旧 API)中:
$address = "......";
$json = file_get_contents("http://maps.googleapis.com/maps/api/geocode/json?sensor=false&address=".urlencode($address));
$json = json_decode($json);
if ($json->status == "OK")
return $json->results[0]->geometry->location;
javascript 正在寻找一个值
var address = document.getElementById('address').value;
在 html 输入中没有值:
<input id="address" name="address" placeholder="Adrese" type="text">
在您的代码中,表单对 PHP 页面执行 POST
但您 post 只有地址字段而没有从 google api.
加上您调用的 API 给出了一个复杂的 return 类型,您应该检查它...要获得纬度和经度,您必须从数组中选择一个元素并检查 return 中的内容=13=]...(您可以检查:https://developers.google.com/maps/documentation/javascript/reference#GeocoderResult)
因此,首先,在 post 表单之前进行 ajax 调用以获取坐标。
只需添加 onsubmit="return codeAddress();"
然后在您的 codeAddress 函数中添加一个 return false;
以防止默认操作(防止提交表单本身)并通过 GET 等函数将数据发送到 registerEvent.php这个。
在你的HTML中:
<html>
<head>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true"></script>
<script type="text/javascript">
function codeAddress() {
var geocoder = new google.maps.Geocoder();
var address = document.getElementById('address').value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var inputLat = results[0].geometry.location.lat();
var inputLng = results[0].geometry.location.lng();
window.location.href = "registerEvent.php?inputLat=" + inputLat + "&inputLng=" + inputLng;
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
return false;
}
</script>
</head>
<body>
<form action="registerEvent.php" id="form" method="post" onsubmit="return codeAddress()">
<input id="address" name="address" placeholder="Adrese" type="text">
<button type="submit" id="submit">Send</button>
</form>
</body>
</html>
在你的PHP中:
<?php
require("dbinfo.php");
$connection=mysqli_connect ('localhost', $username, $password);
if (!$connection) {
die('Not connected : ' . mysql_error());
}
$db_selected = mysqli_select_db($connection, $database);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
$lat =$_GET['inputLat'];
$lng =$_GET['inputLng'];
$sql = "INSERT INTO sometable (lat, lng) VALUES ('$lat', '$lng')";
if (!mysqli_query($connection,$sql)) {
die('Error: ' . mysqli_error($connection));
};
mysqli_close($connection);
?>