posts<\/code> table with some basic fields in the MySQL database.<\/p>\nCREATE<\/span> TABLE<\/span> `posts<\/span>` (\r\n `id`<\/span> int<\/span>(11<\/span>) NOT NULL<\/span> AUTO_INCREMENT,\r\n `title`<\/span> varchar<\/span>(255<\/span>) COLLATE utf8_unicode_ci NOT NULL<\/span>,\r\n `content`<\/span> text<\/span> COLLATE utf8_unicode_ci NOT NULL<\/span>,\r\n `created`<\/span> datetime NOT NULL<\/span>,\r\n `modified`<\/span> datetime NOT NULL<\/span>,\r\n `status`<\/span> enum('1'<\/span>,'0'<\/span>) COLLATE utf8_unicode_ci NOT NULL<\/span> DEFAULT '1'<\/span> COMMENT '1=Active, 0=Inactive'<\/span>,\r\n PRIMARY KEY<\/span> (`id`<\/span>)\r\n) ENGINE=<\/span>InnoDB DEFAULT CHARSET=<\/span>utf8 COLLATE=<\/span>utf8_unicode_ci;\r\n<\/pre>\nController (Posts.php)<\/h2>\n
The Posts controller contains 3 functions, __construct()<\/code>, index()<\/code>, and loadMoreData()<\/code>.
\n__construct():<\/b><\/p>\n\n- Load Post model to fetch data from the database.<\/li>\n
- Set per page data list limit.<\/li>\n<\/ul>\n
index():<\/b><\/p>\n\n- Fetch posts data from the database using getRows() function of Post model.<\/li>\n
- Pass the post data to view and load this view.<\/li>\n<\/ul>\n
loadMoreData():<\/b> This method is called by the Ajax request to load more data.<\/p>\n\n- Get the ID of the last displayed post.<\/li>\n
- Fetch the posts data based on the last post ID.<\/li>\n
- Pass the post data to the view to load more post data.<\/li>\n<\/ul>\n
<?php defined<\/span>(<\/span>'BASEPATH'<\/span>) OR exit(<\/span>'No direct script access allowed'<\/span>);
class <\/span>Posts <\/span>extends <\/span>CI_Controller <\/span>{
function <\/span>__construct<\/span>() {
<\/span>parent<\/span>::<\/span>__construct<\/span>();
<\/span>\/\/ Load post model
<\/span>$this<\/span>-><\/span>load<\/span>-><\/span>model<\/span>(<\/span>'post'<\/span>);
<\/span>\/\/ Per page limit
<\/span>$this<\/span>-><\/span>perPage <\/span>= <\/span>4<\/span>;
}
public function <\/span>index<\/span>(){
<\/span>$data <\/span>= array();
<\/span>\/\/ Get posts data from the database
<\/span>$conditions<\/span>[<\/span>'order_by'<\/span>] = <\/span>\"id DESC\"<\/span>;
<\/span>$conditions<\/span>[<\/span>'limit'<\/span>] = <\/span>$this<\/span>-><\/span>perPage<\/span>;
<\/span>$data<\/span>[<\/span>'posts'<\/span>] = <\/span>$this<\/span>-><\/span>post<\/span>-><\/span>getRows<\/span>(<\/span>$conditions<\/span>);
<\/span>\/\/ Pass the post data to view
<\/span>$this<\/span>-><\/span>load<\/span>-><\/span>view<\/span>(<\/span>'posts\/index'<\/span>, <\/span>$data<\/span>);
}
function <\/span>loadMoreData<\/span>(){
<\/span>$conditions <\/span>= array();
<\/span>\/\/ Get last post ID
<\/span>$lastID <\/span>= <\/span>$this<\/span>-><\/span>input<\/span>-><\/span>post<\/span>(<\/span>'id'<\/span>);
<\/span>\/\/ Get post rows num
<\/span>$conditions<\/span>[<\/span>'where'<\/span>] = array(<\/span>'id <'<\/span>=><\/span>$lastID<\/span>);
<\/span>$conditions<\/span>[<\/span>'returnType'<\/span>] = <\/span>'count'<\/span>;
<\/span>$data<\/span>[<\/span>'postNum'<\/span>] = <\/span>$this<\/span>-><\/span>post<\/span>-><\/span>getRows<\/span>(<\/span>$conditions<\/span>);
<\/span>\/\/ Get posts data from the database
<\/span>$conditions<\/span>[<\/span>'returnType'<\/span>] = <\/span>''<\/span>;
<\/span>$conditions<\/span>[<\/span>'order_by'<\/span>] = <\/span>\"id DESC\"<\/span>;
<\/span>$conditions<\/span>[<\/span>'limit'<\/span>] = <\/span>$this<\/span>-><\/span>perPage<\/span>;
<\/span>$data<\/span>[<\/span>'posts'<\/span>] = <\/span>$this<\/span>-><\/span>post<\/span>-><\/span>getRows<\/span>(<\/span>$conditions<\/span>);
<\/span>$data<\/span>[<\/span>'postLimit'<\/span>] = <\/span>$this<\/span>-><\/span>perPage<\/span>;
<\/span>\/\/ Pass data to view
<\/span>$this<\/span>-><\/span>load<\/span>-><\/span>view<\/span>(<\/span>'posts\/load-more-data'<\/span>, <\/span>$data<\/span>, <\/span>false<\/span>);
}
}<\/span><\/pre>\nModel (Post.php)<\/h2>\n
The Post model handles the database related work.<\/p>\n
\n- __construct()<\/b> – Specify the table name of the database.<\/li>\n
- getRows()<\/b> – Fetch the posts data from the database based on the condition and returns as an array.<\/li>\n<\/ul>\n
<?php <\/span>if ( ! <\/span>defined<\/span>(<\/span>'BASEPATH'<\/span>)) exit(<\/span>'No direct script access allowed'<\/span>);
class <\/span>Post <\/span>extends <\/span>CI_Model<\/span>{
function <\/span>__construct<\/span>() {
<\/span>$this<\/span>-><\/span>tblName <\/span>= <\/span>'posts'<\/span>;
}
<\/span>\/*
* Fetch posts data from the database
* @param id returns a single record if specified, otherwise all records
*\/
<\/span>function <\/span>getRows<\/span>(<\/span>$params <\/span>= array()){