php CI框架学习笔记-分页实现程序

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php CI框架学习笔记-分页实现程序

本文章是一个自己的对CI框架的学习笔记,用一个完整的搜索,查找并且实现分页的程序给大家参考参考.

举个按关键词搜索结果分页的例子.

视图HTML,代码如下:

<div id="body">

<form action="/index.php/search/index/" method="get">

<p>请输入书名、作者、出版社中的一个或多个来查询。</p>

<p><input type="text" name="s" value="" size="64" /> <input type="submit" value="搜索" /></p>

</form>

</div>

即表单提交到名叫search的controller和名叫index的方法,其中包含了一些动态参数,不是纯列表,故相对比较复杂,后面会提到,代码如下:

public function index() {

$keyword = $this->input->get ( 's' );

$offset = $this->input->get ( 'offset' );

if (emptyempty ( $offset )) {

$offset = 0;

}

if (! emptyempty ( $keyword )) {

$this->load->model ( 'book_model' );

$this->load->library ( 'pagination' );

$per_page = 10;

$config ['num_links'] = 5;

$config ['base_url'] = '/index.php/' . $this->router->class . '/' . $this->router->method . '/?s=' . $keyword;

$config ['per_page'] = $per_page;

$config ['total_rows'] = $this->Book_Model->find_by_name ( $keyword, NULL, NULL, true );

$config ['page_query_string'] = false;

$config ['query_string_segment'] = 'offset'; //重新定义记录起始位置的参数名，默认为per_page

$this->pagination->initialize ( $config );

$data ['books'] = $this->Book_Model->find_by_name ( $keyword, $per_page, $offset );

$this->load->view ( 'search', $data );

} else {

$this->load->view ( 'search' );

}

}

因为config.php中默认的enable_query_strings是false,起始位置始终在最后,这样出来的结果类似/index.php/search/index/?s=中国/10,页码取不到,需要将此配置改为false;

模型,代码如下:

public function find_by_name($name, $per_page=0, $offset = 0, $is_total = false) {

if ($is_total) {//总数

$query = $this->db->query ( "select count(id) as cnt from {$this->_book} where book_name like '%{$name}%'" );

if ($query->num_rows () > 0) {

$row = $query->row ();

$ret = $row->cnt;

}

}else{//列表

$query = $this->db->query ("select * from {$this->_book} where book_name like '%{$name}%' limit {$offset}, {$per_page}");

$ret = $query->result ();

}

return $ret;

}

出处：http://www.phpfensi.com/php/20140729/4043.html

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