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社区首页 >问答首页 >将PHP变量从HTML表单传递到Javascript

问将PHP变量从HTML表单传递到Javascript
EN

Stack Overflow用户
提问于 2022-06-17 12:19:30
回答 2查看 163关注 0票数 -2

您能帮我把一个从html表单中提取的变量传递到javascript中吗？

表单请求表名。

代码语言：javascript
复制
  <br>
    New tablename:<br>
    <input  type="text"  name="table">

它通过PHP传递：

代码语言：javascript
复制
if (isset($_POST['submit'])) {
    $user = $_POST['user'];
    $password = $_POST['password'];
    $table = $_POST['table'];
    $geometry = $_POST['geom'];
  
}

第一个操作正在进行，并成功地创建了: Geoserver postgis表是通过PHP创建的(下面的全部代码)

然后javascript尝试使用PHP获取$table；这将帮助它将新创建的postgis Geoserver表从PHP加载到中；

代码语言：javascript
复制
    <?php
echo "var thedata = " .$table. ";\n";
?>

..。

代码语言：javascript
复制
  var wfstPoly = new L.WFST({
    url: 'https://mappingforyou.eu/geoserver/ows',
    typeNS: 'opendata',
    typeName: thedata,

但是这个代码不起作用：

代码语言：javascript
复制
    <?php
echo "var thedata = " .$table. ";\n";
?>

--除了数据javascript变量外，代码工作正常。整个表格：

代码语言：javascript
复制
<!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javascripttest1.php页面：

代码语言：javascript
复制
<!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: '&copy; <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>
geoserver
javascript
php
variables
EN

回答 2

Stack Overflow用户

回答已采纳

发布于 2022-06-17 12:32:18

在您提供的代码中，如下所示：

代码语言：javascript
复制
if (isset($_POST['submit'])) {
    $user = $_POST['user'];
    $password = $_POST['password'];
    $table = $_POST['table'];
    $geometry = $_POST['geom'];
  
}

...comes之后：

代码语言：javascript
复制
echo "var thedata = " .$table. ";\n";

PHP变量$table的初始赋值需要在使用它之前完成。

如果表单文本输入提供的表名是字符串，则当$table被分配给Javascript变量thedata时，需要引用它。

例如：

代码语言：javascript
复制
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，结果文本(包含HTML、Javascript、CSS )通过HTTP发送到浏览器。浏览器永远不会获得PHP代码。浏览器只获取HTML、Javascript和CSS。一旦浏览器从服务器获得这些内容，它就会评估Javascript并呈现HTML和CSS。

这个，在服务器上：

代码语言：javascript
复制
function jsFunction(){

<?php

if (isset($_POST['submit'])) {
    $user = $_POST['user'];
    $password = $_POST['password'];
    $table = $_POST['table'];
    $geometry = $_POST['geom'];

}

// ...

echo "var thedata = \"" .$table. "\";\n";

?>

<!-- ... -->

执行了...is，结果如下：

代码语言：javascript
复制
function jsFunction(){

var thedata = "user provided table name";


<!-- ... -->

然后将...which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

票数 1
EN

Stack Overflow用户

发布于 2022-06-17 12:33:28

试着在下面

var thedata =<?php echo $table; ?>+“n”；

票数 -3
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/72659291

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