填充数据库中的多个依赖下拉列表

时间:2012-05-22 08:11:32

标签: php jquery mysql ajax

我有2个下拉菜单。第一个我填充了可能的大陆,并希望第二个下拉菜单包括所有国家,这取决于在第一个菜单中选择的大陆。我只有1个带有列的mysql表:continent - >国家。目前,即使选择了一个大陆,也有来自各大洲的所有国家。谢谢您的帮助! 这是我的代码:

HTML

<input type="text" class="autosuggest" id="autosuggest2" placeholder="Select Country...">
<div class="country">
<ul class="result" id="result2"></ul>
</div>
<input type="text" class="autosuggest" id="autosuggest3" placeholder="Select Area...">
<div class="area">
<ul class="result" id="result3"></ul>
</div>

jQuery / Ajax

$(document).ready(function() { 
$('#autosuggest1').keyup(function() {
    var continent = $(this).attr('value');
    $.post('php/dropdown.php', {continent:continent}, function(data) {
        $('#result1').html(data);

        $('.result li').click(function() {
            var result_value = $(this).text();
            $('#autosuggest1').attr('value', result_value);
            $('#result1').html('');
            $('#result1').focusout('');
        });
    });
});

$('#autosuggest2').keyup(function() {
    var country = $(this).attr('value');
    $.post('php/dropdown.php', {country:country}, function(data) {
        $('#result2').html(data);

        $('.result li').click(function() {
            var result_value = $(this).text();
            $('#autosuggest2').attr('value', result_value);
            $('#result2').html('');
            $('#result2').focusout('');
        });
    });
});
});

PHP

require_once '../connect/connectdropdown.php';

if (isset($_POST['continent']) == true && empty($_POST['continent']) == false) {
$continent = mysql_real_escape_string($_POST['continent']);
$query = mysql_query("SELECT DISTINCT `continent` FROM `area` WHERE `continent`    LIKE '$continent%'");
while (($row = mysql_fetch_assoc($query)) !== false) {
    echo '<li>', $row['continent'], '</li>';
}   
}

if (isset($_POST['country']) == true && empty($_POST['country']) == false) {
$country = mysql_real_escape_string($_POST['country']);
$query = mysql_query("SELECT DISTINCT `country` FROM `area` WHERE `country` LIKE '$country%'");
while (($row = mysql_fetch_assoc($query)) !== false) {
    echo '<li>', $row['country'], '</li>';
}   
}

1 个答案:

答案 0 :(得分:1)

我想知道你是否还在这。无论如何我会建议几件事:

只做一个查询,将其传递给json,并将其提供给javascript。

PHP

require_once '../connect/connectdropdown.php';
$id=0;
$result=array();
$query = mysql_query("SELECT * FROM `area` ");
while (($row = mysql_fetch_assoc($query)) !== false) {
   $result[$id]=$row;
   $id++;
}   
echo json_encode($result);

的Javascript

$(document).ready(function() { 
      var $mysqlData;
      $.post('php/dropdown.php', {continent:continent}, function(data) {

        //Json Data from server:
        alert('JSON data: '+data)
        //you can transform the data from PHP-Json to Javascript Object
        $mysqlData = jQuery.parseJSON(data)
        //now you can access your data like:
        alert ('My first continent: '+$mysqlData[0].continent+' and it\'s first country: '+$mysqlData[0].country)
      });

      $('#autosuggest1').keyup(function() {
          //Now you can use $mysqlData inside your logic
      })

      $('#autosuggest2').keyup(function() {
          //You can use $mysqlData here too
      })

});

我没有测试这段代码,可能会出现一些错误,但我建议你采用这种逻辑。