Simple PHP paging implementation

  One 、 Method class

<?php
/**
 *  Paging class 
 *
 *  Call mode ：
 * $p=new Page( Total number of articles , Displays the number of pages , The current page number , Number of bars per page ,[ link ]);
 * print_r($p->getPages()); // Generate an array of page numbers （ Key is page number , The value is link ）
 * echo $p->showPages(1);    // Generate a page number style （ You can add custom styles ）
 *
 */

/*
 Total number of articles , Number of pages to display , The current page , Number of entries per page , Connect 
 Generate a one-dimensional array , Key is page number   The value is connection 
 Return a page number with a generated style （ And you can add styles according to your needs ）
 Default style   common 45 Bar record , Each page shows 10 strip , Current 1/4 page  [ home page ] [ page-up key ] [1] [2] [3] .. [ next page ] [ Tail page ]
*/
namespace app\atl\controller;
use think\Controller;
use think\Exception;

class Page extends controller{
    private $myde_total;          // Total number of records 
    private $myde_size;           // The number of records displayed on a page 
    private $myde_page;           // The current page 
    private $myde_page_count;     // Total number of pages 
    private $myde_i;              // Number of starting pages 
    private $myde_en;             // End pages 
    private $myde_url;            // Get current url
    /*
     * $show_pages
     *  Format of page display , The number of pages showing links is 2*$show_pages+1.
     *  Such as $show_pages=2 Then the page shows [ home page ] [ page-up key ] 1 2 3 4 5 [ next page ] [ Tail page ]
     */
    private $show_pages;
    public function __construct($myde_total = 1,$myde_size = 1, $myde_page = 1, $myde_url, $show_pages = 2) {
        $this->myde_total = $this->numeric($myde_total);
        $this->myde_size = $this->numeric($myde_size);
        $this->myde_page = $this->numeric($myde_page);
        $this->myde_page_count = ceil($this->myde_total / $this->myde_size);
        $this->myde_url = $myde_url;
        if ($this->myde_total < 0)
            $this->myde_total = 0;
        if ($this->myde_page < 1)
            $this->myde_page = 1;
        if ($this->myde_page_count < 1)
            $this->myde_page_count = 1;
        if ($this->myde_page > $this->myde_page_count)
            $this->myde_page = $this->myde_page_count;
        $this->limit = ($this->myde_page - 1) * $this->myde_size;
        $this->myde_i = $this->myde_page - $show_pages;
        $this->myde_en = $this->myde_page + $show_pages;
        if ($this->myde_i < 1) {
            $this->myde_en = $this->myde_en + (1 - $this->myde_i);
            $this->myde_i = 1;
        }
        if ($this->myde_en > $this->myde_page_count) {
            $this->myde_i = $this->myde_i - ($this->myde_en - $this->myde_page_count);
            $this->myde_en = $this->myde_page_count;
        }
        if ($this->myde_i < 1)
            $this->myde_i = 1;
    }

    // Detect whether it is a number 
    private function numeric($num) {
        if (strlen($num)) {
            if (!preg_match("/^[0-9]+$/", $num)) {
                $num = 1;
            } else {
                $num = substr($num, 0, 11);
            }
        } else {
            $num = 1;
        }
        return $num;
    }

    // Address replacement 
    private function page_replace($page) {
        return str_replace("{page}", $page, $this->myde_url);
    }

    // home page 
    private function myde_home() {
        if ($this->myde_page != 1) {
            return "<a href='" . $this->page_replace(1) . "' title=' home page '> home page </a>";
        } else {
            return "<p> home page </p>";
        }
    }

    // The previous page 
    private function myde_prev() {
        if ($this->myde_page != 1) {
            return "<a href='" . $this->page_replace($this->myde_page - 1) . "' title=' The previous page '> The previous page </a>";
        } else {
            return "<p> The previous page </p>";
        }
    }

    // The next page 
    private function myde_next() {
        if ($this->myde_page != $this->myde_page_count) {
            return "<a href='" . $this->page_replace($this->myde_page + 1) . "' title=' The next page '> The next page </a>";
        } else {
            return"<p> The next page </p>";
        }
    }

    // Tail page 
    private function myde_last() {
        if ($this->myde_page != $this->myde_page_count) {
            return "<a href='" . $this->page_replace($this->myde_page_count) . "' title=' Tail page '> Tail page </a>";
        } else {
            return "<p> Tail page </p>";
        }
    }

    // Output 
    public function myde_write($id = 'page') {
        $str = "<div id=" . $id . ">";
//        $str.=$this->myde_home();
        $str.=$this->myde_prev();
        if ($this->myde_i > 1) {
            $str.="<p class='pageEllipsis'>...</p>";
        }
        for ($i = $this->myde_i; $i <= $this->myde_en; $i++) {
            if ($i == $this->myde_page) {
                $str.="<a href='" . $this->page_replace($i) . "' title=' The first " . $i . " page ' class='cur'>$i</a>";
            } else {
                $str.="<a href='" . $this->page_replace($i) . "' title=' The first " . $i . " page '>$i</a>";
            }
        }
        if ($this->myde_en < $this->myde_page_count) {
            $str.="<p class='pageEllipsis'>...</p>";
        }
        $str.=$this->myde_next();
//        $str.=$this->myde_last();
//        $str.="<p class='pageRemark'> common <b>" . $this->myde_page_count .
//            "</b> page <b>" . $this->myde_total . "</b> Data </p>";
        $str.="</div>";
        return $str;
    }
}
?>

Two 、 style

#page{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    height:30px;
}
#page a{
    display:block;
    float:left;
    margin-right:10px;
    padding: 0 12px;
    height: 30px;
    border:1px #cccccc solid;
    background:#fff;
    text-decoration:none;
    color:#808080;
    font-size: 14px;
    line-height: 30px;
}
#page a:hover{
    color:#EB5C0D;
    border:1px #EB5C0D solid;
}
#page a.cur{
    border:none;
    background:#EB5C0D;
    color:#fff;
}
#page p{
    float:left;
    padding: 0 12px;
    font-size:15px;
    height: 30px;
    line-height: 30px;
    color:#bbb;
    border:1px #ccc solid;
    background:#fcfcfc;
    margin-right:8px;

}
#page p.pageRemark{
    border-style:none;
    background:none;
    margin-right:0px;
    color:#666;
}
#page p.pageRemark b{
    margin: 0 6px;
    color: #EB5C0D;
}
#page p.pageEllipsis{
    border-style:none;
    background:none;
    padding:4px 0px;
    color:#808080;
}
.dates li {font-size: 14px;margin:20px 0}
.dates li span{float:right}

3、 ... and 、 Reference method

  $page = new \Page(' General record ',' Single page record ',' Current page ',' link ?page= The current page ');
        $str = "<div id=" . $id . ">";
//        $str.=$this->myde_home();
        $str.=$this->myde_prev();
        if ($this->myde_i > 1) {
            $str.="<p class='pageEllipsis'>...</p>";
        }
        for ($i = $this->myde_i; $i <= $this->myde_en; $i++) {
            if ($i == $this->myde_page) {
                $str.="<a href='" . $this->page_replace($i) . "' title=' The first " . $i . " page ' class='cur'>$i</a>";
            } else {
                $str.="<a href='" . $this->page_replace($i) . "' title=' The first " . $i . " page '>$i</a>";
            }
        }
        if ($this->myde_en < $this->myde_page_count) {
            $str.="<p class='pageEllipsis'>...</p>";
        }
        $str.=$this->myde_next();
//        $str.=$this->myde_last();
//        $str.="<p class='pageRemark'> common <b>" . $this->myde_page_count .
//            "</b> page <b>" . $this->myde_total . "</b> Data </p>";
        $str.="</div>";
        return $str;