我是第一年的学生，我需要一名助手使用以下代码，我被赋予了使用框架创建会员系统的任务，我选择使用codeigniter 我在codeigniter中创建下拉列表时遇到了困难。信息正在加载成员数据库。我只需要一个如何实现这个人口下拉列表的方向
DATABASE
CREATE TABLE `member` (
`id` tinyint(4) NOT NULL auto_increment,
`membership` tinyint(4) NOT NULL,
`region` tinyint(4) NOT NULL,
`country` tinyint(4) NOT NULL,
`state` varchar(40) NOT NULL,
`city` varchar(40) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=3 ;
CREATE TABLE `region` (
`id` tinyint(4) NOT NULL auto_increment,
`region` varchar(20) NOT NULL default '',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=3 ;
--
-- Dumping data for table `region`
--
INSERT INTO `region` (`id`, `region`) VALUES
(1, 'South Africa'),
(2, 'Botswana'),
(3, 'Namibia'),
(4, 'Swaziland'),
(5, 'International');
CREATE TABLE `country` (
`id` tinyint(4) NOT NULL auto_increment,
`regionid` tinyint(4) NOT NULL,
`country` varchar(40) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=3 ;
INSERT INTO `country` (`id`, `regionid`, `country`) VALUES
(1, 1, 'Eastern Cape'),
(2, 1, 'Free State'),
(3, 2, 'Gaborone'),
(4, 2, 'Lobatsi'),
(5, 3, 'Windhoek'),
(6, 4, 'Swaziland'),
(7, 5, 'International');
CREATE TABLE `state` (
`id` tinyint(4) NOT NULL auto_increment,
`regionid` tinyint(4) NOT NULL,
`countryid` tinyint(4) NOT NULL,
`state` varchar(40) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=3 ;
INSERT INTO `state` (`id`, `regionid`, `countryid`, `state`) VALUES
(1, 1, 1, 'Bloemfointein'),
(2, 1, 1, 'Bethehem');
CREATE TABLE `city` (
`id` tinyint(4) NOT NULL auto_increment,
`regionid` tinyint(4) NOT NULL,
`countryid` tinyint(4) NOT NULL,
`stateid` tinyint(4) NOT NULL,
`city` varchar(40) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=3 ;
JAVASCRIPT
<script language="JavaScript">
function autoSubmit()
{
var formObject = document.forms['theForm'];
formObject.submit();
}
</script>
CONTROLLER
function member($param1 = '', $param2 = '', $param3 = '')
{
if ($this->session->userdata('admin_login') != 1)
redirect('login', 'refresh');
if ($param1 == 'create') {
$data['membership_no'] = $this->input->post('membership_no');
$data['region'] = $this->input->post('region');
$data['country'] = $this->input->post('country');
$data['state'] = $this->input->post('state');
$data['city'] = $this->input->post('city');
$this->db->insert('member', $data);
$member_id = mysql_insert_id();
move_uploaded_file($_FILES['userfile']['tmp_name'], 'uploads/member_image/' . $member_id . '.jpg');
$this->email_model->account_opening_email('member', $data['email']); //SEND EMAIL ACCOUNT OPENING EMAIL
redirect(base_url() . 'index.php?admin/member_add/' . $data['class_id'], 'refresh');
}
查看
<?php
$region = $country = $state = $city = null; //declare vars
if(isset($_GET["region"]) && is_numeric($_GET["region"]))
{
$region = $_GET["region"];
}
if(isset($_GET["country"]) && is_numeric($_GET["country"]))
{
$country = $_GET["country"];
}
if(isset($_GET["state"]) && is_numeric($_GET["state"]))
{
$state = $_GET["state"];
}
if(isset($_GET["city"]) && is_numeric($_GET["city"]))
{
$city = $_GET["city"];
}
?>
<?php echo form_open('admin/member/create/' , array('class' => 'form-horizontal form-groups-bordered validate', 'enctype' => 'multipart/form-data'));?>
<div class="form-group">
<label for="field-1" class="col-sm-3 control-label"><?php echo get_phrase('membership_no');?></label>
<div class="col-sm-5">
<input type="text" class="form-control" name="membership_no" data-validate="required" data-message-required="<?php echo get_phrase('value_required');?>" value="" autofocus>
</div>
</div>
<select name="region" onChange="autoSubmit();">
<option value="null"></option>
<option value="1" <?php if($region == 1) echo " selected"; ?>>East</option>
<option value="2" <?php if($region == 2) echo " selected"; ?>>West</option>
</select>
<br><br>
<?php
if($region != null && is_numeric($region))
{
?>
<select name="country" ">
<option value="null"></option>
<?php
//POPULATE DROP DOWN MENU WITH COUNTRIES FROM A GIVEN REGION
$sql = "SELECT COUN_ID, COUN_NAME FROM COUNTRY WHERE RE_ID = $region";
$countries = mysql_query($sql,$conn);
while($row = mysql_fetch_array($countries))
{
echo ("<option value=\"$row[COUN_ID]\" " . ($country == $row["COUN_ID"] ? " selected" : "") . ">$row[COUN_NAME]</option>");
}
?>
</select>
<?php
}
?>
<br><br>
<?php
if($country != null && is_numeric($country) && $region != null)
{
?>
<select name="state" onChange="autoSubmit();">
<option value="null"></option>
<?php
//POPULATE DROP DOWN MENU WITH STATES FROM A GIVEN REGION, COUNTRY
$sql = "SELECT STAT_ID, STAT_NAME FROM states WHERE COUN_ID = $country ";
$states = mysql_query($sql,$conn);
while($row = mysql_fetch_array($states))
{
echo ("<option value=\"$row[STAT_ID]\" " . ($state == $row["STAT_ID"] ? " selected" : "") . ">$row[STAT_NAME]</option>");
}
?>
</select>
<?php
}
?>
<br><br>
<?php
if($state != null && is_numeric($state) && $region != null && $country != null)
{
?>
<select name="city" onChange="autoSubmit();">
<option value="null"></option>
<?php
//POPULATE DROP DOWN MENU WITH CITIES FROM A GIVEN REGION, COUNTRY, STATE
$sql = "SELECT CIT_ID, CITY_NAME FROM CITY WHERE STAT_ID = $state ";
$cities = mysql_query($sql,$conn);
while($row = mysql_fetch_array($cities))
{
echo ("<option value=\"$row[CIT_ID]\" " . ($city == $row["CIT_ID"] ? " selected" : "") . ">$row[CITY_NAME]</option>");
}
?>
</select>
<?php
}
?>
答案 0 :(得分：1)
你需要在开始编码之前先学习一下框架，在编写代码之前先了解MVC，我相信你对我的评论很生气但很遗憾地说有很多改进可用。
https://ellislab.com/codeigniter/user-guide/helpers/form_helper.html
$options = array(
'small' => 'Small Shirt',
'med' => 'Medium Shirt',
'large' => 'Large Shirt',
'xlarge' => 'Extra Large Shirt',
);
//pass this `$options` as a part of an array to view.
$data['options'] = $options
$this->load->view('sample_page', $data);
$shirts_on_sale = array('small', 'large');
echo form_dropdown('shirts', $options, 'large');
// Would produce:
<select name="shirts">
<option value="small">Small Shirt</option>
<option value="med">Medium Shirt</option>
<option value="large" selected="selected">Large Shirt</option>
<option value="xlarge">Extra Large Shirt</option>
</select>
echo form_dropdown('shirts', $options, $shirts_on_sale);
// Would produce:
<select name="shirts" multiple="multiple">
<option value="small" selected="selected">Small Shirt</option>
<option value="med">Medium Shirt</option>
<option value="large" selected="selected">Large Shirt</option>
<option value="xlarge">Extra Large Shirt</option>
</select>