有人可以帮忙吗？
我正在尝试将此代码转换为CI，但是我对JQuery遇到问题，因为我不太了解它。
原始代码来自-http://www.99points.info/2010/12/n-level-dynamic-loading-of-dropdowns-using-ajax-and-php/-可以在CI外部完美运行。
我可以看到第一个下拉列表。
然后，当它在“ index2.php”的第15行上加载“ get_chid_categories.php”时，我得到一个错误-我理解为什么（尝试从“ root”中的文件读取数据库），但是我不知道如何解决它。
我的看法-index2.php
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script type="text/javascript" src="/jquery.livequery.js"></script>
<script type="text/javascript">
$(document).ready(function() {
//$('#loader').hide();
$('.parent').livequery('change', function() {
$(this).nextAll('.parent').remove();
$(this).nextAll('label').remove();
$('#show_sub_categories').append('</application/views/img src="loader.gif" style="float:left; margin-top:7px;" id="loader" alt="" />');
$.post("/get_chid_categories.php", {
parent_id: $(this).val(),
}, function(response){
setTimeout("finishAjax('show_sub_categories', '"+escape(response)+"')", 400);
});
return false;
});
});
function finishAjax(id, response){
$('#loader').remove();
$('#'+id).append(unescape(response));
}
</script>
<style>
.both h4{ font-family:Arial, Helvetica, sans-serif; margin:0px; font-size:14px;}
#search_category_id{ padding:3px; width:200px;}
.parent{ padding:3px; width:150px; float:left; margin-right:12px;}
.both{ float:left; margin:0 0px 0 0; padding:0px;}
</style>
</head>
<body>
<div id="show_sub_categories">
<select name="search_category" class="parent">
<option value="" selected="selected">-- Categories --</option>
<?php
foreach ($view->result() as $row)
{
?>
<option value="<?php echo $row->id;?>"><?php echo $row->category;?></option>
<?php
}
?>
</select>
</div>
<br clear="all" /><br clear="all" />
</body>
</html>
控制器-Swim.php
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Swim extends CI_Controller {
public function __construct()
{
parent::__construct();
$this->datestring = '%d/%m/%Y';
$this->datewrite = 'Y-d-m';
$this->load->model('Swim_model');
$this->load->helper('date');
$data['not_logged_in'] = 'You are not logged in';
$this->session->set_userdata($data);
}
public function index2()
{
$data['main_view'] = 'index2';
$data['view'] = $this->Swim_model->CRUD_categories();
$this->load->view('load_view',$data);
}
}
模型-Swim_model.php
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Swim_model extends CI_Model {
public function __construct()
{
// Call the CI_Model constructor
parent::__construct();
}
public function CRUD_categories()
{
return $this->db->select('*')
->from('categories')
->where('pid', '0')
->get();
}
}
get_child_categories.php-如果将其放在“根目录”中，则只能使其包含此文件
<?php
if($_REQUEST)
{
$id = $_REQUEST['parent_id'];
$query = $this->db->select('*')
->from('categories')
->where('pid', $id)
->get();
?>
<select name="sub_category" class="parent">
<option value="" selected="selected">-- Sub Category --</option>
<?php
foreach ($query->result() as $row)
{
?>
<option value="<?php echo $row->id;?>"><?php echo $row->category;?></option>
<?php
}?>
</select>
<?php
}
?>
jquery.livequery.js-也在'root'中
/*! Copyright (c) 2008 Brandon Aaron (http://brandonaaron.net)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
*
* Version: 1.0.3
* Requires jQuery 1.1.3+
* Docs: http://docs.jquery.com/Plugins/livequery
*/
(function($) {
$.extend($.fn, {
livequery: function(type, fn, fn2) {
var self = this, q;
// Handle different call patterns
if ($.isFunction(type))
fn2 = fn, fn = type, type = undefined;
// See if Live Query already exists
$.each( $.livequery.queries, function(i, query) {
if ( self.selector == query.selector && self.context == query.context &&
type == query.type && (!fn || fn.$lqguid == query.fn.$lqguid) && (!fn2 || fn2.$lqguid == query.fn2.$lqguid) )
// Found the query, exit the each loop
return (q = query) && false;
});
// Create new Live Query if it wasn't found
q = q || new $.livequery(this.selector, this.context, type, fn, fn2);
// Make sure it is running
q.stopped = false;
// Run it immediately for the first time
q.run();
// Contnue the chain
return this;
},
expire: function(type, fn, fn2) {
var self = this;
// Handle different call patterns
if ($.isFunction(type))
fn2 = fn, fn = type, type = undefined;
// Find the Live Query based on arguments and stop it
$.each( $.livequery.queries, function(i, query) {
if ( self.selector == query.selector && self.context == query.context &&
(!type || type == query.type) && (!fn || fn.$lqguid == query.fn.$lqguid) && (!fn2 || fn2.$lqguid == query.fn2.$lqguid) && !this.stopped )
$.livequery.stop(query.id);
});
// Continue the chain
return this;
}
});
$.livequery = function(selector, context, type, fn, fn2) {
this.selector = selector;
this.context = context || document;
this.type = type;
this.fn = fn;
this.fn2 = fn2;
this.elements = [];
this.stopped = false;
// The id is the index of the Live Query in $.livequery.queries
this.id = $.livequery.queries.push(this)-1;
// Mark the functions for matching later on
fn.$lqguid = fn.$lqguid || $.livequery.guid++;
if (fn2) fn2.$lqguid = fn2.$lqguid || $.livequery.guid++;
// Return the Live Query
return this;
};
$.livequery.prototype = {
stop: function() {
var query = this;
if ( this.type )
// Unbind all bound events
this.elements.unbind(this.type, this.fn);
else if (this.fn2)
// Call the second function for all matched elements
this.elements.each(function(i, el) {
query.fn2.apply(el);
});
// Clear out matched elements
this.elements = [];
// Stop the Live Query from running until restarted
this.stopped = true;
},
run: function() {
// Short-circuit if stopped
if ( this.stopped ) return;
var query = this;
var oEls = this.elements,
els = $(this.selector, this.context),
nEls = els.not(oEls);
// Set elements to the latest set of matched elements
this.elements = els;
if (this.type) {
// Bind events to newly matched elements
nEls.bind(this.type, this.fn);
// Unbind events to elements no longer matched
if (oEls.length > 0)
$.each(oEls, function(i, el) {
if ( $.inArray(el, els) < 0 )
$.event.remove(el, query.type, query.fn);
});
}
else {
// Call the first function for newly matched elements
nEls.each(function() {
query.fn.apply(this);
});
// Call the second function for elements no longer matched
if ( this.fn2 && oEls.length > 0 )
$.each(oEls, function(i, el) {
if ( $.inArray(el, els) < 0 )
query.fn2.apply(el);
});
}
}
};
$.extend($.livequery, {
guid: 0,
queries: [],
queue: [],
running: false,
timeout: null,
checkQueue: function() {
if ( $.livequery.running && $.livequery.queue.length ) {
var length = $.livequery.queue.length;
// Run each Live Query currently in the queue
while ( length-- )
$.livequery.queries[ $.livequery.queue.shift() ].run();
}
},
pause: function() {
// Don't run anymore Live Queries until restarted
$.livequery.running = false;
},
play: function() {
// Restart Live Queries
$.livequery.running = true;
// Request a run of the Live Queries
$.livequery.run();
},
registerPlugin: function() {
$.each( arguments, function(i,n) {
// Short-circuit if the method doesn't exist
if (!$.fn[n]) return;
// Save a reference to the original method
var old = $.fn[n];
// Create a new method
$.fn[n] = function() {
// Call the original method
var r = old.apply(this, arguments);
// Request a run of the Live Queries
$.livequery.run();
// Return the original methods result
return r;
}
});
},
run: function(id) {
if (id != undefined) {
// Put the particular Live Query in the queue if it doesn't already exist
if ( $.inArray(id, $.livequery.queue) < 0 )
$.livequery.queue.push( id );
}
else
// Put each Live Query in the queue if it doesn't already exist
$.each( $.livequery.queries, function(id) {
if ( $.inArray(id, $.livequery.queue) < 0 )
$.livequery.queue.push( id );
});
// Clear timeout if it already exists
if ($.livequery.timeout) clearTimeout($.livequery.timeout);
// Create a timeout to check the queue and actually run the Live Queries
$.livequery.timeout = setTimeout($.livequery.checkQueue, 20);
},
stop: function(id) {
if (id != undefined)
// Stop are particular Live Query
$.livequery.queries[ id ].stop();
else
// Stop all Live Queries
$.each( $.livequery.queries, function(id) {
$.livequery.queries[ id ].stop();
});
}
});
// Register core DOM manipulation methods
$.livequery.registerPlugin('append', 'prepend', 'after', 'before', 'wrap', 'attr', 'removeAttr', 'addClass', 'removeClass', 'toggleClass', 'empty', 'remove');
// Run Live Queries when the Document is ready
$(function() { $.livequery.play(); });
// Save a reference to the original init method
var init = $.prototype.init;
// Create a new init method that exposes two new properties: selector and context
$.prototype.init = function(a,c) {
// Call the original init and save the result
var r = init.apply(this, arguments);
// Copy over properties if they exist already
if (a && a.selector)
r.context = a.context, r.selector = a.selector;
// Set properties
if ( typeof a == 'string' )
r.context = c || document, r.selector = a;
// Return the result
return r;
};
// Give the init function the jQuery prototype for later instantiation (needed after Rev 4091)
$.prototype.init.prototype = $.prototype;
})(jQuery);
该文件会将类别加载到MYSQL数据库中
CREATE TABLE IF NOT EXISTS `categories` (
`id` int(11) NOT NULL auto_increment,
`category` varchar(50) NOT NULL,
`pid` int(11),
PRIMARY KEY (`id`)
);
--
-- Dumping data for table `categories`
--
INSERT INTO `categories` (`id`, `category`, `pid`) VALUES
(1, 'Barncroft',0),
(2, 'Mary Rose',0),
(3, 'Petersfield',0),
(4, 'Redwood',0),
(5, 'Springfield',0),
(6, 'Mon',1),
(7, 'Tue',1),
(8, 'Wed',1),
(9, 'Thu',1),
(10, 'Fri',1),
(11, 'Sat',1),
(12, 'Sun',1),
(13, 'Mon',2),
(14, 'Tue',2),
(15, 'Wed',2),
(16, 'Thu',2),
(17, 'Fri',2),
(18, 'Sat',2),
(19, 'Sun',2),
(20, 'Mon',3),
(21, 'Tue',3),
(22, 'Wed',3),
(23, 'Thu',3),
(24, 'Fri',3),
(25, 'Sat',3),
(26, 'Sun',3),
(27, 'Mon',4),
(28, 'Tue',4),
(29, 'Wed',4),
(30, 'Thu',4),
(31, 'Fri',4),
(32, 'Sat',4),
(33, 'Sun',4),
(34, 'Mon',5),
(35, 'Tue',5),
(36, 'Wed',5),
(37, 'Thu',5),
(38, 'Fri',5),
(39, 'Sat',5),
(40, 'Sun',5),
(41, '07:00',6),
(42, '07:30',6),
(43, '08:00',6),
(44, '08:30',6),
(45, '09:00',6),
(46, '09:30',6),
(47, '10:00',6),
(48, '10:30',6),
(49, '11:00',6);
参考方案
我会尝试将get_child_categories作为一种方法添加到您的Swim控制器中：
function get_child_categories()
{
$id = $_REQUEST['parent_id'];
$query = $this->db->select('*')->from('categories')->where('pid', $id)->get();
$html = '<select name="sub_category" class="parent">';
$html .= '<option value="" selected="selected">-- Sub Category --</option>';
foreach ($query->result() as $row){
$html .= '<option value="'.$row->id.'">'.$row->category.'</option>';
}
$html .= '</select>';
echo $html;
}
在您看来，您可以这样称呼它：
$.post("swim/get_child_categories", { //etc
我是PHP的新手，正在尝试使用Datatables jQuery插件。我知道我必须从.php文件中获取数据，然后在数据表中使用它，但是我似乎无法通过ajax将其传递给数据表。我设法从数据库中获取数据，并对其进行json编码，但是后来我不知道如何在我的index.php文件中调用它，并在其中显示它。我究竟做错了什么？这是我的代码：HTML（已编辑）： <…
交叉加入codeigniter？ - php我正在尝试$this->db->join('tableTwo as b','','CROSS'); $result = $this->db->get('tableOne as a')->result(); 有解决办法吗？ 参考方案 Codeignit…
PHP:对数组排序 - php请如何排序以下数组Array ( 'ben' => 1.0, 'ken' => 2.0, 'sam' => 1.5 ) 至Array ( 'ken' => 2.0, 'sam' => 1.5, 'ben' =&…
将输入类型复选框关联到输入类型文本 - php我有一个问题，我需要将输入类型复选框与输入类型文本关联。情况如下：从数据库中提取数据。 PK数据是复选框的值。当复选框选择输入类型的文本时，您可以在其中输入特定数字。现在的问题是，选中所有类型的复选框输入文本都会被激活。我希望通过选择复选框输入，仅启用与复选框相关联的输入。我的HTML代码（此代码创建一个输入复选框，并为数据库中的每个记录输入文本，而我要激活…
codeigniter 2.0.3-致命错误 - php我是Codeigniter的新手，尝试了其中一个教程的课程，但抛出以下错误：Class 'Controller' not found in C:\xampp\htdocs\CodeIgniter\application\controllers\email.php on line 3 我的代码：<?php class Email ex…