php利用Pagerfanta给通用数据库类库Medoo分页

这是两个非常优秀的php类库

medoo:一个通用的php的数据库客户端。
"pagerfanta/pagerfanta":"1.0.5" 一个通用的php的分页组件。
结合在一起棒棒哒！

首先，composer安装

"pagerfanta/pagerfanta":"1.0.5"
"catfan/medoo":"1.4.5"

建表

CREATE TABLE `test_databases` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `db_name` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '' COMMENT '库名',
  `user_id` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '测试用户id',
  `created_at` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '创建时间',
  `updated_at` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '修改时间',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB

请自行插入一百条数据

分页代码

<?php
namespace app\control;
use Medoo\Medoo as me;

use Pagerfanta\Pagerfanta;
use Pagerfanta\View\DefaultView;
use Pagerfanta\Adapter\AdapterInterface;

class MedooPage {
    public function index($req, $res, $args) {
        $database = new me ( [
            // 必须
            'database_type' => 'mysql',
            'database_name' => 'test1',
            'server' => '127.0.0.1',
            'username' => 'root',
            'password' => 'root',
            
            // 可选，但最好加上
            'charset' => 'utf8mb4',
            'port' => 3306,
            
            // [optional] Enable logging (Logging is disabled by default for better performance)
            'logging' => true,
            
            // [optional] driver_option for connection, read more from http://www.php.net/manual/en/pdo.setattribute.php
            'option' => [ 
                \PDO::ATTR_STRINGIFY_FETCHES => false,
                \PDO::ATTR_EMULATE_PREPARES => false 
            ] 
        ]  );
        //构造查询条件       
        $table = 'test_databases';
        $where=["id[<]"=>90];
        $col='*';
        //我把两个类一起放这个文件，工程中最好分开
        // 注，medoo还有带join的select方法，建议再写一个适配器，然后根据查询条件的不同
        // 调用不同的适配器，反正也就两个。
        $adapter = new MedooPageAdapter($database,$table,$col, $where);
        $pagerfanta = new Pagerfanta($adapter);
        $page = intval( $_GET["page"]);
        if (!$page) {
            $page=1;
        }
        //设置当前页，最大页面。
        $pagerfanta->setMaxPerPage(4)->setCurrentPage($page);
        //打印当前页面的结果
        foreach ($pagerfanta->getCurrentPageResults() as $v ) {
            echo $v['db_name'] .' = ' . $v['user_id']."<br>";
        }
        //打印分页链接。
        $routeGenerator = function($page) { // 匿名函数解决链接字符串
            return '/paginator/doctrine?page='.$page;
        };
        $view = new DefaultView();
        $options = array('proximity' => 3); // 这个数字干嘛用？中间的链接个数=这个数字*2+1，这个数字一般取3.
        $html = $view->render($pagerfanta, $routeGenerator, $options);
        echo $this->default_css();
        echo  "<div class='pagerfanta'>" .$html."</div>";
        return $res;
    }
    
    private function default_css()
    {
        $css=<<<css
        <style>
            .pagerfanta {
            }
            
            .pagerfanta a,
            .pagerfanta span {
                display: inline-block;
                border: 1px solid blue;
                color: blue;
                margin-right: .2em;
                padding: .25em .35em;
            }
            
            .pagerfanta a {
                text-decoration: none;
            }
            
            .pagerfanta a:hover {
                background: #ccf;
            }
            
            .pagerfanta .dots {
                border-width: 0;
            }
            
            .pagerfanta .current {
                background: #ccf;
                font-weight: bold;
            }
            
            .pagerfanta .disabled {
                border-color: #ccf;
                color: #ccf;
            }
            
            
            
            .pagerfanta a,
            .pagerfanta span {
                border-color: blue;
                color: blue;
            }
            
            .pagerfanta a:hover {
                background: #ccf;
            }
            
            .pagerfanta .current {
                background: #ccf;
            }
            
            .pagerfanta .disabled {
                border-color: #ccf;
                color: #cf;
            }
                    </style>
css;
        return $css;
    }
}

/**
 * 分页适配器
 * @author xieye
 *
 */
class MedooPageAdapter implements AdapterInterface
{
    
    private $table='';
    private $where=[];
    private $db  ;
    private $col;
    
    public function __construct($db,$table, $col, $where){
        $this->table = $table;
        $this->where = $where;
        $this->col = $col;
        $this->db = $db;
    }
    
    public function getNbResults(){
        $db = $this->db;
        return $db->count($this->table, $this->where);
    }
    
    /**
     * Returns an slice of the results.
     *
     * @param integer $offset The offset.
     * @param integer $length The length.
     *
     * @return array|\Traversable The slice.
     */
    public function getSlice($offset, $length){
        $where = $this->where;
        $where["LIMIT"] = [$offset, $length];
        return $this->db->select($this->table,$this->col, $where);
    }
    
}

浏览器效果