Php分页链接范围。 需要帮助调整循环

I need this kind of pagination

with a small change

the pagination should never show more than 5 buttons/links ( not counting next/prev ) and if I am somewhere in mid of pagination it should show

1 ... 5 6 7 ... 20

or

1... 9 10 11 ... 20

if on last page

1... 17 18 19 20

I started with this

function pagination (){
    // prev link

    $html ='';
    $numpages = 20;
    $current_page = 1;
    $dotshow = true;

    if ($numpages != 1) {
        $html .='<span><i class="fa fa-angle-left"></i></span>';// prev


        for($i=1; $i <= $numpages; $i++){


            if ($i == 1 || $i == $numpages ||  ($i >= $current_page - 3 &&  $i <= $current_page + 3) ) {
                  $dotshow = true;
                  if ($i != $current_page){

                    $html .='<a class="pagination-link" href="#linkhere">';
                    $html .='<span> '.$i.'</span>';
                    $html .='</a>'; 

                  }else{
                    $html .='<span class="current">';
                    $html .='<span> '.$i.'</span>';
                    $html .='</span>';            

                  }
               }else if ( $dotshow ){

                   $dotshow = false;
                    $html .='<span class="dots">';
                    $html .='<span> ... </span>';
                    $html .='</span>';  
            }

        }
        $html .='<span><i class="fa fa-angle-right"></i></span>';// next
    }
    if($html !=''){
        return $html;
    }

}

on first and last I get this

but on my page 5 it shows this and number of links increases because of the wrong current , total , limit calc.

any help is appreciated!

This is the schema. You can adapt it with your html code, styles and variable:

$pages is the total page number, $page is the current page, $start is the first of pages “group”:

/* Set subgroup page start:                           */
if    ( $pages < 6        ) $start = 2;             
elseif( $page  < 3        ) $start = 2;             
elseif( $page  > $pages-3 ) $start = $pages - 3;    
else                        $start = $page  - 1;    

/* Compose line:                                      */
/* Page 1 (always):                                   */
$output = '[1]';
/* Initial separator:                                 */
if( $start > 2 ) $output .= '...';
/* Page subgroup: ends if reached +2 or pages-1       */
for( $i = $start; $i < $pages; $i++ ) 
{ 
    $output .= "[$i]"; 
    if( $i > ($start+1) ) break; 
}
/* Final separator:                                   */
if( $start < $pages - 3 ) $output .= '...';
/* Last page:                                         */
if( $pages > 1 ) $output .= "[$pages]";

/* Output:                                            */
echo $output;

I have added comments in code, because I think it is self-explanatory. Feel free to ask if you have doubt.

phpFiddle demo

Thnx to fusion3K for workaround but the fix for my version is to adjust the limit on specific page numbers

function pagination (){

    $html ='';
    $numpages = 20;
    $current_page = 1;
    $dotshow = true;


    if( $current_page == 2 || $current_page == $numpages -1 ){

        $limit = 2;

    }else if($current_page >= 3 && $current_page != $numpages ){

        $limit = 1;

    }else{

        $limit = 3;
    }

    if ($numpages != 1) {
        $html .='<span><i class="fa fa-angle-left"></i></span>';// prev


        for($i=1; $i <= $numpages; $i++){


            if ($i == 1 || $i == $numpages ||  ($i >= $current_page - $limit &&  $i <= $current_page + $limit) ) {
                  $dotshow = true;
                  if ($i != $current_page){

                    $html .='<a class="pagination-link" href="#linkhere">';
                    $html .='<span> '.$i.'</span>';
                    $html .='</a>'; 

                  }else{
                    $html .='<span class="current">';
                    $html .='<span> '.$i.'</span>';
                    $html .='</span>';            

                  }
               }else if ( $dotshow ){

                   $dotshow = false;
                    $html .='<span class="dots">';
                    $html .='<span> ... </span>';
                    $html .='</span>';  
            }

        }
        $html .='<span><i class="fa fa-angle-right"></i></span>';// next
    }
    if($html !=''){
        return $html;
    }

}