php – 如何在功能中使用参数CodeIgniter？

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class City extends CI_Controller {

    public function load_page( $state,$page = 1 ){

        // I'm going to use an alias for this model
        $this->load->model('example_model','model');

        // Use the URL helper for site_url()
        $this->load->helper('url');

        // Set pagination config
        $config['pagination_settings'] = [
            'per_page'          => 10,'use_page_numbers'  => TRUE,'uri_segment'       => 4,// This is very important!!!
            'base_url'          => site_url('city/load_page/' . $state)
        ];

        // Get the total rows
        $config['pagination_settings']["total_rows"] = $this->model->pagination_count( $state );

        // Load and initialize pagination
        $this->load->library('pagination');
        $this->pagination->initialize($config['pagination_settings']);

        $data = [
            'state' => $state,'rows' => $this->model->get_cities( $state,$page,$config['pagination_settings']['per_page'] ),'links' => $this->pagination->create_links()
        ];

        // Use data in views or wherever needed ...
        $this->load->view('city',$data);
    }

    /**
     * Create the rows to paginate
     */
    public function setup()
    {
        // I'm going to use an alias for this model
        $this->load->model('example_model','model');

        $this->model->setup();
    }

    // -----------------------------------------------------------------------
}

接下来,您应该将数据库查询移动到模型.您不需要为2个选择类型查询使用事务.

<?php
defined('BASEPATH') or exit('No direct script access allowed');

class Example_model extends CI_Model{

    public function __construct()
    {
        parent::__construct();

        $this->load->database();
    }

    public function pagination_count( $state )
    {
        return $this->db->where("state",$state)
            ->count_all_results('city');
    }

    public function get_cities( $state,$limit )
    {
        $offset = ( $page * $limit ) - $limit;

        $query = $this->db->where("state",$state)
            ->limit( $limit,$offset )
            ->get('city');

        if( $query->num_rows() > 0 )
            return $query->result();

        return NULL;
    }

    /**
     * Setup for testing
     */
    public function setup()
    {
        $this->load->dbforge();

        $fields = array(
            'id' => array(
                'type' => 'INT','constraint' => 5,'unsigned' => TRUE,'auto_increment' => TRUE
            ),'state' => array(
                'type' => 'VARCHAR','constraint' => '32',),'city' => array(
                'type' => 'VARCHAR',);
        $this->dbforge->add_field($fields);
        $this->dbforge->add_key('id',TRUE);
        $this->dbforge->create_table('city',TRUE);

        for( $x = 1; $x <= 40; $x++ )
        {
            $this->db->insert('city',array(
                'state' => 'ca','city'  => 'x' . $x
            ));
        }
    }
}

这是我使用的视图：

<?php

echo '<h1>' . $state . '</h1>';

echo $links . '<br /><br />';

foreach( $rows as $row )
{
    echo $row->city . '<br />';
}

为了设置数据库进行测试,我去了：

http://localhost/index.php/city/setup

然后检查分页是否有效,我去了：

http://localhost/index.php/city/load_page/ca

它应该适合您,因为此代码现在已经过全面测试.

更新——————–

如果要为分页添加更多参数,请使用查询字符串.您需要使用以下额外设置设置分页配置：

$config['pagination_settings']['reuse_query_string'] = TRUE;

这意味着配置看起来像这样：

$config['pagination_settings'] = [
    'per_page'           => 10,'use_page_numbers'   => TRUE,'uri_segment'        => 4,// This is very important!!!
    'base_url'           => site_url('city/load_page/' . $state),'reuse_query_string' => TRUE
];

然后使用params创建指向第一页的链接：

http://localhost/index.php/city/load_page/ca?a=1&b=2&c=3

并且由于reuse_query_strings被设置为TRUE,这意味着？a = 1& b = 2& c = 3将全部附加到分页链接.