我在将从动态下拉列表中选择的变量传递给 PHP 文件时遇到问题。我希望 PHP 选择 db 表中与变量匹配的所有行。这是到目前为止的代码：
选择.php
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("select#type").attr("disabled","disabled");
$("select#category").change(function(){
$("select#type").attr("disabled","disabled");
$("select#type").html("<option>wait...</option>"); var id = $("select#category option:selected").attr('value');
$.post("select_type.php", {id:id}, function(data){
$("select#type").removeAttr("disabled");
$("select#type").html(data);
});
});
$("form#select_form").submit(function(){
var cat = $("select#category option:selected").attr('value');
var type = $("select#type option:selected").attr('value');
if(cat>0 && type>0)
{
var result = $("select#type option:selected").html();
$("#result").html('your choice: '+result);
$.ajax({
type: 'POST',
url: 'display.php',
data: {'result': myval},
});
}
else
{
$("#result").html("you must choose two options!");
}
return false;
});
});
</script>
</head>
<body>
<?php include "select.class.php"; ?>
<form id="select_form">
Choose a category:<br />
<select id="category">
<?php echo $opt->ShowCategory(); ?>
</select>
<br /><br />
Choose a type:<br />
<select id="type">
<option value="0">choose...</option>
</select>
<br /><br />
<input type="submit" value="confirm" />
</form>
<div id="result"></div>
<?php include "display.php"; ?>
<div id="result2"></div>
</body>
</html>
这是我希望将变量传递给的 display.php。该文件将从数据库中选择标准，然后在 select.php 中打印结果。
<?php
class DisplayResults
{
protected $conn;
public function __construct()
{
$this->DbConnect();
}
protected function DbConnect()
{
include "db_config.php";
$this->conn = mysql_connect($host,$user,$password) OR die("Unable to connect to the database");
mysql_select_db($db,$this->conn) OR die("can not select the database $db");
return TRUE;
}
public function ShowResults()
{
$myval = $_POST['result'];
$sql = "SELECT * FROM specialities WHERE 'myval'=sp_name";
$res = mysql_query($sql,$this->conn);
echo "<table border='1'>";
echo "<tr><th>id</th><th>Code</th></tr>";
while($row = mysql_fetch_array($res))
{
while($row = mysql_fetch_array($result)){
echo "<tr><td>";
echo $row['sp_name'];
echo "</td><td>";
echo $row['sp_code'];
echo "</td></tr>";
}
echo "</table>";
//}
}
return $category;
}
}
$res = new DisplayResults();
?>
我真的很感激任何帮助。如果我可以提供更多详细信息，请告诉我。
db图链接：http: //imgur.com/YZ0SuVw
第一个下拉列表来自专业表，第二个来自专业表。我想做的是显示工作表中与下拉框中选择的专业匹配的所有行。这将需要将下拉列表中的变量（结果）的结果转换为作业表中的 spec_code。不确定如何执行此操作。谢谢！