构建此表单以便稍后放入更大的表单。这个想法是为了填充第一个下拉列表，然后根据第一个下拉列表填充第二个下拉列表。这是form.php和func.php。这是我第一次进入AJAX。我知道我错过了一些东西，但可能是＆＃34;代码失明＆＃34;。
表格
<?php
include('db.php');
include('func.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Chained Select Boxes using PHP, MySQL and jQuery</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('#wait_1').hide();
$('#drop_1').change(function(){
$('#wait_1').show();
$('#result_1').hide();
$.get("func.php", {
func: "drop_1",
drop_var: $('#drop_1').val()
}, function(response){
$('#result_1').fadeOut();
setTimeout("finishAjax('result_1', '"+escape(response)+"')", 400);
});
return false;
});
$('#wait_2').hide();
$('#drop_2').change(function(){
$('#wait_2').show();
$('#result_2').hide();
$.get("func.php", {
func: "drop_2",
drop_var: $('#drop_2').val()
}, function(response){
$('#result_2').fadeOut();
setTimeout("finishAjax2('result_2', '"+escape(response)+"')", 400);
});
return false;
});
});
function finishAjax(id, response) {
$('#wait_1').hide();
$('#'+id).html(unescape(response));
$('#'+id).fadeIn();
}
function finishAjax2(id, response) {
$('#wait_2').hide();
$('#'+id).html(unescape(response));
$('#'+id).fadeIn();
}
function finishAjax_tier_three(id, response) {
$('#wait_2').hide();
$('#'+id).html(unescape(response));
$('#'+id).fadeIn();
}
function finishAjax_tier_four(id, response) {
$('#wait_3').hide();
$('#'+id).html(unescape(response));
$('#'+id).fadeIn();
}
</script>
</head>
<body>
<p>
<form action="" method="post">
<select name="drop_1" id="drop_1">
<option value="" selected="selected" disabled="disabled">Select Manufacturer</option>
<?php getTierOne(); ?>
</select>
<span id="wait_1" style="display: none;">
<img alt="Please Wait" src="ajax-loader.gif"/>
</span>
<span id="result_1" style="display: none;"></span>
<span id="wait_2" style="display: none;">
<img alt="Please Wait" src="ajax-loader.gif"/>
</span>
<span id="result_2" style="display: none;"></span>
<span id="wait_3" style="display: none;">
<img alt="Please Wait" src="ajax-loader.gif"/>
</span>
<span id="result_3" style="display: none;"></span>
</form>
</p>
<p>
<?php if(isset($_POST['submit'])){
$drop = $_POST['drop_1'];
$drop_2 = $_POST['drop_2'];
$drop_3 = $_POST['drop_3'];
$drop_4 = $_POST['drop_4'];
echo "You have a ";
echo $drop." ".$drop_2." is selected from ".$drop_3." ".$drop_4;
?>
<table border="1" bordercolor="#B5B5B5" style="background-color:#FFFFFF" width="250" cellpadding="3" cellspacing="3">
<tr>
<td>Manufacturer</td>
<td><?php echo $drop;?></td>
</tr>
<tr>
<td>Model</td>
<td><?php echo $drop_2;?></td>
</tr>
<tr>
<td>Size</td>
<td><?php echo $drop_3;?></td>
</tr>
<tr>
<td>Pressure</td>
<td><?php echo $drop_4;?></td>
</tr>
</table>
<?php
}
?>
</body>
功能
<?php
// Page load dropdown results //
function getTierOne()
{
$result = mysql_query("SELECT FROM stmTrps ASC")
or die(mysql_error());
while($tier = mysql_fetch_array( $result ))
{
echo '<option value="'.$tier['Trap_Manufacturer'].'">'.$tier['Trap_Manufacturer'].'</option>';
}
}
// First selection results //
if (isset($_GET['func'])&& $_GET['func'] == "drop_1" ) {
drop_1($_GET['drop_var']);
}
function drop_1($drop_var)
{
include_once('db.php');
$result = mysql_query("SELECT DISTINCT Trap_Manufacturer FROM stmTrps WHERE Trap_Manufacturer='$drop_var' ORDER BY Trap_Manufacturer")
or die(mysql_error());
echo '<select name="drop_2" id="drop_2">
<option value=" " disabled="disabled" selected="selected">Select Model</option>';
while($drop_2 = mysql_fetch_array( $result ))
{
echo '<option value="'.$drop_2['Trap_Model'].'">'.$drop_2['Trap_Model'].'</option>';
}
echo '</select>';
echo "<script type=\"text/javascript\">
$('#wait_2').hide();
$('#drop_2').change(function(){
$('#wait_2').show();
$('#result_2').hide();
$.get(\"func.php\", {
func: \"drop_2\",
drop_var: $('#drop_1').val(),
drop_var2: $('#drop_2').val()
}, function(response){
$('#result_2').fadeOut();
setTimeout(\"finishAjax_tier_three('result_2', '\"+escape(response)+\"')\", 400);
});
return false;
});
</script>";
}
// Second selection results //
if (isset($_GET['func'])&& $_GET['func'] == "drop_2" ) {
drop_2($_GET['drop_var'], $_GET['drop_var2']);
}
function drop_2($drop_var, $drop_var2)
{
include_once('db.php');
$result = mysql_query("SELECT DISTINCT size FROM stmTrps WHERE Trap_Manufacturer='$drop_var' AND Trap_Model='$drop_var2'")
or die(mysql_error());
echo '<select name="drop_3" id="drop_3">
<option value=" " disabled="disabled" selected="selected">Select Size</option>';
while($drop_3 = mysql_fetch_array( $result ))
{
echo '<option value="'.$drop_3['size'].'">'.$drop_3['size'].'</option>';
}
echo '</select>';
echo "<script type=\"text/javascript\">
$('#wait_3').hide();
$('#drop_3').change(function(){
$('#wait_3').show();
$('#result_3').hide();
$.get(\"func.php\", {
func: \"drop_3\",
drop_var: $('#drop_1').val(),
drop_var2: $('#drop_2').val(),
drop_var3: $('#drop_3').val()
}, function(response){
$('#result_3').fadeOut();
setTimeout(\"finishAjax_tier_four('result_3', '\"+escape(response)+\"')\", 400);
});
return false;
});
</script>";
}
// Second selection results //
if(isset($_GET['func'])&& $_GET['func'] == "drop_3" ) {
drop_3($_GET['drop_var'], $_GET['drop_var2'], $_GET['drop_var3']);
}
function drop_3($drop_var, $drop_var2, $drop_var3)
{
include_once('db.php');
$result = mysql_query("SELECT * FROM stmTrps WHERE Trap_Manufacturer='$drop_var' AND Trap_Model='$drop_var2' AND size='$drop_var3'")
or die(mysql_error());
echo '<select name="drop_4" id="drop_4">
<option value="" disabled="disabled" selected="selected">Select Pressure</option>';
while($drop_4 = mysql_fetch_array( $result ))
{
if ($drop_4['accu'] != "") {
echo '<option value="'.$drop_4['accu'].'">'.$drop_4['accu'].'</option>';
}
}
echo '</select> ';
echo '<input type="submit" name="submit" value="Submit" />';
}
?>