Question

我使用JS / PHP / MySQL创建了一个动态下拉列表，但似乎我在PHP中遇到了一些UTF8解码问题。该脚本将用于制作一个小应用程序，帮助我的客户找到符合其标准的产品。我们销售可接受不同输入范围的面板仪表，其中许多用+/-或值表示（例如：仪表可以在指定电压附近处理+/- 10V电压。）一切都开始变得很好在我的脚本中，除了通过（+，/，±，½等）解析一些字符时我的数据库最初使用±来表示加号或减号，但后来切换到+/-（三个字符）希望它能解决特殊的人物问题，但它没有......

使用console.log我发现我的JS正确编码了特殊字符但是一旦它进入我的PHP就无法正确解码。

沿途的所有内容都设置为UTF8

所以现在我仍然需要弄清楚为什么有些东西没有正确解析。

您可以在http://new.foxmeter.com/find.php查看该脚本的实时版本。

这是我前端的重要部分

    <script src="http://code.jquery.com/jquery-latest.min.js"></script>
    <script>        
        $(function(){
            $("#type").change(function() {
                var tval = document.getElementById('type').value;
                $("#range").load(encodeURI("findbackend.php?type=" + tval));
            });
            $("#range").change(function() {
                rval = document.getElementById('range').value;
                $("#power").load(encodeURI("findbackend.php?range=" + rval));
                console.log(encodeURIComponent(document.getElementById('range').value));
            });
            $("#power").change(function() {
                //var rval = document.getElementById('range').value;
                psval = document.getElementById('power').value;
                $("#setpoint").load(encodeURI("findbackend.php?range=" + rval + "&power=" + psval));
            });
            $("#setpoint").change(function() {
                //var rval = document.getElementById('range').value;
                //var psval = document.getElementById('power').value;
                stval = document.getElementById('setpoint').value;
                $("#output").load(encodeURI("findbackend.php?range=" + rval + "&power=" + psval + "&setpoint=" + stval));
            });
          });
    </script>

</head>
<body>
    <!-- Google Analytics Script -->
    <?php include_once("scripts/analyticstracking.php") ?>

    <div class="wrapper"> <!-- Sticky Footer Wrapper -->
        <div id="panorama"></div>
        <div id="header">
            <?php include("include/header/banner.php") ?>
            <?php include("include/header/nav.php") ?>
            <?php include("include/header/quicksearch.php") ?>
        </div>
        <div id="content">
            <div id="findoptions">
                <select id="type" class="finddrops">
                    <option selected value="base">Please Select</option>
                    <option value="DC Voltage">DC Voltage</option>
                    <option value="DC Current">DC Current</option>
                    <option value="AC Voltage">AC Voltage</option>
                    <option value="AC Current">AC Current</option>
                    <option value="Strainguage">Strainguage</option>
                </select>
                <br>
                <select id="range" class="finddrops">
                    <option>Please choose from above</option>
                </select>
                <br>
                <select id="power" class="finddrops">
                    <option>Please choose from above</option>
                </select>
                <br>
                <select id="setpoint" class="finddrops">
                    <option>Please choose from above</option>
                </select>
                <br>
                <select id="output" class="finddrops">
                    <option>Please choose from above</option>
                </select>
                <br>
                <select id="blarg" class="finddrops">
                    <option>Please choose from above</option>
                </select>                   
            </div>
            <div id="findresults" class="finddrops">
            </div>
        </div>
    </div>

这是我在后端运行的PHP：

<?php
    //\\ MODULAR DEPENDANT DROPDOWNS \\//

    //creates DB connection
    $dbHost = 'host';
    $dbUser = 'user'; 
    $dbPass = 'password';
    $dbDatabase = 'database';
    $con = mysql_connect($dbHost, $dbUser, $dbPass) or trigger_error("Failed to connect to MySQL Server. Error: " . mysql_error());

    mysql_select_db($dbDatabase) or trigger_error("Failed to connect to database {$dbDatabase}. Error: " . mysql_error());

    //prevents injections
    //any order
    $type = mysql_real_escape_string(urldecode($_GET['type']));
    isset($_GET['range'])?$range = mysql_real_escape_string(urldecode($_GET['range'])):"";
    isset($_GET['power'])?$power = mysql_real_escape_string(urldecode($_GET['power'])):"";
    isset($_GET['setpoint'])?$setpoint = mysql_real_escape_string(urldecode($_GET['setpoint'])):"";

    //forms the query depending on what data is recieved through GET
    //first option on the bottom; last option on the top to avoid conflicts 
    if (isset($_GET['setpoint'])) {
        $query = "SELECT DISTINCT stp FROM meters WHERE sio='$range' AND pso='$power' AND stp='$setpoint' ORDER BY model";
    } elseif (isset($_GET['power'])) {
        $query = "SELECT DISTINCT stp FROM meters WHERE sio='$range' AND pso='$power' ORDER BY model";
    } elseif (isset($_GET['range'])) {
        $query = "SELECT DISTINCT pso FROM meters WHERE sio='$range' ORDER BY model";
    } else {
        $query = "SELECT DISTINCT sio FROM meters WHERE sit LIKE '%$type%' ORDER BY model";
    }

    //creates a result array from query results
    $result = mysql_query($query);

    //outputs dropdown options dependent on what GET variables are set
    //first option on the bottom; last option on the top to avoid conflicts
    if (isset($_GET['setpoint'])) {
        while ($row = mysql_fetch_array($result)) {
            echo "<option value='" . $row{'stp'} . "'>" . $row{'stp'} . "</option>";
        }
    } elseif (isset($_GET['power'])) {
        echo "<option>Choose Setpoint Options</option>";
        while ($row = mysql_fetch_array($result)) {
            $row{'stp'} = ucfirst($row{'stp'}); //capitalizes the first letter; necessary?
            echo "<option value='" . $row{'stp'} . "'>" . $row{'stp'} . "</option>";
        }
    } elseif (isset($_GET['range'])) {
        while ($row = mysql_fetch_array($result)) {
            echo "<option value='" . $row{'pso'} . "'>" . $row{'pso'} . "</option>";
        }
    } else {
        while ($row = mysql_fetch_array($result)) {
            echo "<option value='" . $row{'sio'} . "'>" . $row{'sio'} . "</option>";
        }
    }

    //Thanks to Chris Coyier for the wonderful examples on CSS-Tricks
    //A Web Application by Zach Klemp
?>

同样，您可以查看脚本here。

在第一个下拉列表中选择DC Voltage，然后在第二个下拉列表中选择+/-选项，查看问题所在的位置。当您在第一个下拉列表中选择Straingauge然后单击'30 mV with 10 V DC stim'时，它会解析得很好。（另外另一个问题是，选择第一个结果而不先点击另一个结果不会触发.change）

感谢您帮助实现这一目标！我一直在尝试解决这个问题，并没有提出解决方案。

Answer 1

在PHP文件中尝试：

替换任何回音XXXX;使用utf8_decode（XXXX）

应该让它有效

Answer 2

$string = ';http%3A%2F%2Fwww.google.com%2F%3Fq%3Dtesting%2Burldecode'; 
echo urldecode($string); // http://www.google.com/?q=testing+urldecode

有关详细信息，请参阅urldecode here上的官方PHP文档。

如何在PHP中正确解码javascript编码的URI？

2 个答案: