我已经使用 JS/PHP/MySQL 创建了一个动态下拉列表，但似乎我的 PHP 中的 UTF8 解码存在一些问题。该脚本将用于制作一个小型应用程序，帮助我的客户找到符合他们标准的产品。我们销售可以接受不同输入范围的面板仪表，其中许多都用 +/- 或一个值表示（例如：仪表可以预期处理指定电压附近 +/- 10V 的电压。）一切都开始运转良好在我的脚本中，除非通过（+、/、±、½ 等）解析某些字符特殊字符问题，但它没有......
使用 console.log 我发现我的 JS 正确编码了特殊字符，但是一旦它到达我的 PHP，它就不能正确解码。
一路上的一切都设置为UTF8
所以现在我仍然需要弄清楚为什么有些东西解析不正确。
您可以在http://new.foxmeter.com/find.php查看脚本的实时版本。
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，您可以在此处查看脚本。
在第一个下拉菜单中选择 DC Voltage，然后在第二个下拉菜单中选择 +/- 选项，看看问题从哪里开始。当您在第一个下拉列表中选择 Straingauge，然后单击“30 mV 和 10 V DC 激励”时，它可以很好地解析。（顺便说一句，我遇到的另一个问题是选择第一个结果而不先单击另一个结果不会触发.change）
感谢您为使其正常工作提供的任何帮助！我一直在尝试解决这个问题，但还没有提出解决方案。