[英]Pass PHP variable from HTML form to Javascript
你能帮我把一个从 html 表格中取出的变量传递给 javascript 吗？
表格要求输入表名
<br>
New tablename:<br>
<input type="text" name="table">
它通过 PHP 传递：
if (isset($_POST['submit'])) {
$user = $_POST['user'];
$password = $_POST['password'];
$table = $_POST['table'];
$geometry = $_POST['geom'];
}
第一个动作正在进行中，并创建成功：Geoserver postgis 表是通过 PHP curl 创建的（下面有完整代码）
然后 javascript 尝试使用 PHP 插入获取 $table； 这将帮助它将新创建的 postgis Geoserver 表从 PHP 加载到 WFST javascript 中；
<?php
echo "var thedata = " .$table. ";\n";
?>
...
var wfstPoly = new L.WFST({
url: 'https://mappingforyou.eu/geoserver/ows',
typeNS: 'opendata',
typeName: thedata,
但是这段代码不起作用：
<?php
echo "var thedata = " .$table. ";\n";
?>
-- 除了 thedata javascript 变量外，代码工作正常。 整个表格：
<!DOCTYPE html>
<html>
<body>
<h2>PG GS input test</h2>
<form method="POST" action="test1.php">
User:<br>
<input type="text" name="user">
<br>
Password:<br>
<input type="password" name="password">
<br>
New tablename:<br>
<input type="text" name="table">
<input type="radio" name="geom" id="Point" value="Point" />
<label for="Point">Point</label>
<input type="radio" name="geom" id="MultiLineString" value="MultiLineString" />
<label for="MultiLine">Line</label>
<input type="radio" name="geom" id="MultiPolygon" value="MultiPolygon" />
<label for="MultiPolygon">Area</label>
<br><br>
<input type="submit" name="submit">
</form>
</body>
</html>
进入这个 javascript test1.php 页面：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.2.0/leaflet.css"/>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css"/>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet.toolbar.js/0.3.0/leaflet.toolbar.css" />
<style>
html, body, #map {
margin: 0;
height: 100%;
width: 100%;
}
</style>
<title>Leaflet-WFST polygon demo</title>
</head>
<body>
<div id="map"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.2.0/leaflet.js"></script>
<link rel="stylesheet" href="https://mappingforyou.eu/javascript/leaflet.draw.css" />
<script src="https://mappingforyou.eu/javascript/leaflet.draw-src.js"></script>
<link type="text/css" rel="stylesheet" href="https://mappingforyou.eu/javascript/leaflet-easybutton.css" />
<script type="text/javascript" src="https://mappingforyou.eu/javascript/leaflet-easybutton.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4leaflet/1.0.2/proj4leaflet.js"></script>
<script src="https://mappingforyou.eu/javascript/leaflet-wfst.src.js"></script>
<script>
function jsFunction(){
<?php
echo "var thedata = " .$table. ";\n";
?>
var map = L.map('map', {editable: true}).setView([48.5, 2], 10);
// add an OpenStreetMap tile layer
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);
var wfstPoly = new L.WFST({
url: 'http://localhost:8080/geoserver/ows',
typeNS: 'workspace',
typeName: thedata,
crs: L.CRS.EPSG4326,
geometryField: 'geom',
style: {
color: 'blue',
weight: 2
}
}).addTo(map)
.once('load', function () {
map.fitBounds(wfstPoly);
});
////// draw and edit
var drawControl = new L.Control.Draw({
draw:{circle:false, circlemarker:false, rectangle:false,
},
edit:{featureGroup: wfstPoly } });
map.addControl(drawControl);
map.on('draw:created', function (e) {
var layer = e.layer;
wfstPoly.addLayer(layer)});
map.on('draw:edited', function (e) {
var layers = e.layers;
layers.eachLayer( function (layer) {
wfstPoly.editLayer(layer);
})
});
// Save button
L.easyButton('fa-save', function () {
wfstPoly.save();
}, 'Save changes').addTo(map);
}
</script>
<?php
// Open log file
$logfh = fopen("GeoserverPHP.log", 'w') or die("can't open log file");
// Initiate cURL session
$service = "http://localhost:8080/geoserver/rest"; // replace with your URL
$ws = "workspace";
$ds = "database";
$request = "/workspaces/" . $ws . "/datastores/" . $ds . "/featuretypes";
$url = $service . $request;
$ch = curl_init($url);
if (isset($_POST['submit'])) {
$user = $_POST['user'];
$password = $_POST['password'];
$table = $_POST['table'];
$geometry = $_POST['geom'];
}
define("GEOSERVER_REST_HOST", "http://localhost:8080/geoserver/rest");
define("GEOSERVER_USER", "admin:password");
// Optional settings for debugging
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //option to return string
curl_setopt($ch, CURLOPT_VERBOSE, true);
curl_setopt($ch, CURLOPT_STDERR, $logfh); // logs curl messages
//Required POST request settings
curl_setopt($ch, CURLOPT_POST, True);
//$passwordStr = "admin:geoserver"; // replace with your username:password
curl_setopt($ch, CURLOPT_USERPWD, GEOSERVER_USER);
//POST data
curl_setopt($ch, CURLOPT_HTTPHEADER,
array("Content-type: text/xml"));
$xmlStr = "<featureType>";
$xmlStr .= "<name>".$table."</name>";
$xmlStr .= "<nativeName>".$table."</nativeName>";
$xmlStr .= "<title>".$table."</title>";
$xmlStr .= "<srs>EPSG:4326</srs>";
$xmlStr .= "<attributes>";
$xmlStr .= "<attribute>";
$xmlStr .= "<name>geom</name>";
$xmlStr .= "<binding>com.vividsolutions.jts.geom.".$geometry."</binding>";
$xmlStr .= "</attribute>";
$xmlStr .= "<attribute>";
$xmlStr .= "<name>description</name>";
$xmlStr .= "<binding>java.lang.String</binding>";
$xmlStr .= "</attribute>";
$xmlStr .= "<attribute>";
$xmlStr .= "<name>timestamp</name>";
$xmlStr .= "<binding>java.util.Date</binding>";
$xmlStr .= "</attribute>";
$xmlStr .= "</attributes>";
$xmlStr .= "</featureType>";
curl_setopt($ch, CURLOPT_POSTFIELDS, $xmlStr);
//POST return code
$successCode = 201;
$buffer = curl_exec($ch); // Execute the curl request
// Check for errors and process results
$info = curl_getinfo($ch);
if ($info['http_code'] != $successCode) {
$msgStr = "# Unsuccessful cURL request to ";
$msgStr .= $url." [". $info['http_code']. "]\n";
fwrite($logfh, $msgStr);
} else {
$msgStr = "# Successful cURL request to ".$url."\n";
fwrite($logfh, $msgStr);
}
fwrite($logfh, $buffer."\n");
curl_close($ch); // free resources if curl handle will not be reused
fclose($logfh); // close logfile
echo '<script type="text/javascript">jsFunction();</script>';
return $success;
?>
</body>
</html>
在您提供的代码中，这是：
if (isset($_POST['submit'])) {
$user = $_POST['user'];
$password = $_POST['password'];
$table = $_POST['table'];
$geometry = $_POST['geom'];
}
...在此之后：
echo "var thedata = " .$table. ";\n";
PHP 变量$table的初始赋值需要在使用之前到来。
如果表格文本输入提供的表名是一个字符串，则$table在分配给 Javascript 变量thedata时需要引用：
例如：
function jsFunction(){
<?php
if (isset($_POST['submit'])) {
$user = $_POST['user'];
$password = $_POST['password'];
$table = $_POST['table'];
$geometry = $_POST['geom'];
}
// ...
echo "var thedata = \"" .$table. "\";\n";
?>
<!-- ... -->
请记住，PHP 在服务器上执行，包含 HTML、Javascript、CSS 的结果文本通过 HTTP 发送到浏览器。浏览器永远不会获得 PHP 代码。 浏览器仅获取 HTML、Javascript 和 CSS。一旦浏览器从服务器获取这些，它就会评估 Javascript 并呈现 HTML 和 CSS。
这个，在服务器上：
function jsFunction(){
<?php
if (isset($_POST['submit'])) {
$user = $_POST['user'];
$password = $_POST['password'];
$table = $_POST['table'];
$geometry = $_POST['geom'];
}
// ...
echo "var thedata = \"" .$table. "\";\n";
?>
<!-- ... -->
...执行结果如下：
function jsFunction(){
var thedata = "user provided table name";
<!-- ... -->
...然后将其作为文本发送到浏览器。
我在这里进一步阐述了不同的 PHP 和 Javascript 执行上下文： https://stackoverflow.com/a/72023066/2743458
试试下面
var thedata = <?php echo $table; ?> <?php echo $table; ?> +"\n";
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