javascript - 如何在javascript中传递 session 变量

Question

我是 php 新手...我为 html 编写了 javascript..但我不知道如何使用该 session 值将相同的 javascript 概念写入 php..

我的 session 值:

$_SESSION['line2'],

$_SESSION['oline2']

我的 JavaScript 代码在这里:

function showLocation() {
            var geocoder, location1, location2, gDir;

            geocoder = new GClientGeocoder();
            gDir = new GDirections();
            GEvent.addListener(gDir, "load", function() {
                //var drivingDistanceMiles = gDir.getDistance().meters / 1609.344;
                var drivingDistanceKilometers = gDir.getDistance().meters / 1000;
               // var miles = drivingDistanceMiles ;
                var km = drivingDistanceKilometers;
                //document.getElementById('miles').value = miles;
                document.getElementById('km').value = km;
               
            });

geocoder.getLocations(document.getElementsByName("addressline2")[0].value, function (response) {
                if (!response || response.Status.code != 200)
                {
                    alert("Sorry, we were unable to geocode the first address");
                }
                else
                {
                    location1 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
                    geocoder.getLocations(document.getElementsByName("officeaddressline2")[0].value, function (response) {
                        if (!response || response.Status.code != 200)
                        {
                            alert("Sorry, we were unable to geocode the second address");
                        }
                        else
                        {
                            location2 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
                            gDir.load('from: ' + location1.address + ' to: ' + location2.address);
                        }
                    });
                }
            });
        }   
      

大家帮忙

Answer 1

如果您将该 JavaScript 函数与 PHP 文件一起使用，则可以这样做:

...
var line2 = '<?php echo $_SESSION["line2"]; ?>';
var oline2 = '<?php echo $_SESSION["oline2"]; ?>';
...

要将 JavaScript 变量传递给 PHP，您必须执行以下步骤:

1. 包括JQuery Library在您的页面中(如果您还没有)。
2. 创建一个 PHP 页面来设置变量(即:myPage.php)。
3. 通过 POST 使用 ajax (JQuery) 将 JS 变量传递到 myPage.php。

myPage.php:

<?php
session_start();

$_SESSION['line2'] = $_POST['myVariable'];
$_SESSION['oline2'] = $_POST['anotherOne'];
...

在你的 JS 函数中:

var sth = 'something...';
var sthMore = 'something more...';

$.ajax({
    method: "POST",
    url: "myPage.php",
    data: { myVariable: sth, anotherOne: sthMore }
}).done(function() {
     // alert('done!'); // here you can alert some message (if you want)
 });