Paginator code of the php paging program

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<? Php   Class paginator {   Function _ construct (){       }   Static function render ($ page_type, array $ args = array ()){ $ Html = ''; Switch ($ page_type)         { Case '1 ': $ Html = page_1 ($ channel_code, $ page_num, $ cur_page, $ per_group, $ base_url, $ n, $ v ); Break; Case '2 ': $ Html = fpage ($ row_num, $ pagesize, $ page, $ url ); Break; Case '3 ': Break;   Default: $ Html = page ($ num, $ perpage, $ curpage, $ mpurl, $ hiddenFrom = '');         }   Return $ html;     }       // Function 1: generate paging navigation based on the total page number, current page, page group, and url Function page_1 ($ channel_code, $ page_num, $ cur_page, $ per_group, $ base_url, $ n, $ v ){ // List of paging function parameters (number of pages, current page, number of pages per page, link address) $ Base_url. = strpos ($ base_url ,'? ')? '&':'? '; // If Yes ?, Add &; otherwise add?   $ Page_val = "";   If ($ page_num <1 ){ Return $ page_val; // if the value is smaller than 1, null is returned. } Elseif ($ page_num = 1 ){ Return $ page_val = 1; // if the value is 1, 1 is returned.         }   // Group   $ Group_ OK =! ($ Page_num-1) % ($ per_group-1); // no remainder // Calculate the total number of groups If ($ group_ OK ){ $ Group_num = ($ page_num-1)/($ per_group-1 ); } Else { $ Group_num = ceil ($ page_num-1)/($ per_group-1 )); } // Determine whether the current page is the last one in a group     // Number of groups $ Is_last_page =! ($ Cur_page-1) % ($ per_group-1); // calculates the number of groups currently in If ($ is_last_page ){ $ Cur_group = ($ cur_page-1)/($ per_group-1) + 1; } Else { $ Cur_group = ceil ($ cur_page-1)/($ per_group-1 ));         }   // Calculate the start page displayed. This key is $ From = ($ cur_group-1) * ($ per_group-1) + 1; $ From = $ cur_group <= 1? 1: $ from;   $ To = $ from + $ per_group; $ To = $ to> $ page_num? $ Page_num + 1: $;   For ($ a = $ from; $ a <$ to; $ a ++ ){ If ($! = $ Cur_page ){   // Not the current page $ Page_val. = '<li> <a href = "'. $ base_url. 'Channel = '. $ channel_code. '& n = '. $ n. '& v = '. $ v. '& page = '. $. '"> '. $. '</a> </li> '; } Else { // Current page $ Page_val. = '<li class = "current">'. $ a. '</li> ';             }         }   // Previous Page Next Page first page Last Page $ Next = $ cur_page + 1; // The current page + 1 $ Prev = $ cur_page-1; // Current page-1   If ($ cur_page! = $ Page_num ){ // The current page is not the last page $ Page_val. = '<span> <a href = "'. $ base_url. 'Channel = '. $ channel_code. '& n = '. $ n. '& v = '. $ v. '& page = '. $ next. '"> '. 'Next Page '. '</a> </span> '; $ Page_val. = '<span> <a href = "'. $ base_url. 'Channel = '. $ channel_code. '& n = '. $ n. '& v = '. $ v. '& page = '. $ page_num. '"> '. '> '. '</a> </span>'; // The last page.           } If ($ cur_page! = 1 ){   // Not the first page. Add the preceding content $ Page_val = '<span> <a href = "'. $ base_url. 'Channel = '. $ channel_code. '& n = '. $ n. '& v = '. $ v. '& page = '. $ prev. '"> '. 'previous page '. '</a> </span> '. $ page_val; $ Page_val = '<span> <a href = "'. $ base_url. 'Channel = '. $ channel_code. '& n = '. $ n. '& v = '. $ v. '& page = 1 "> '. '<'. '</a> </span> '. $ page_val; // home page           } $ Page_val = '<ul class = "page_nav">'. $ page_val. '</ul> ';     Return $ page_val;     }         // Function 2: based on the number of records, the number of page column cleanup, the current page, and the url year by page Function fpage ($ row_num, $ pagesize, $ page, $ url ){ // $ Page, current page; $ row_num record count; $ pagesize: number of records per page; $ url record page; // If there is a number, add 1 $ Page_count = $ row_num % $ pagesize? Intval ($ row_num/$ pagesize) + 1: intval ($ row_num/$ pagesize );   If ($ page_count = 1 ){ $ Page_string = "first page | previous page | next page | last page "; } Else { // If there are more than one page If ($ page = 1 ){ // The first page is displayed. $ Page_string = "<a href =". $ url ."? Page = 1> first page </a> | previous page | <a href = ". $ url ."? Page = ". ($ page + 1)."> Next page </a> | <a href = ". $ url ."? Page = ". $ page_count."> Last page </a> ";             } If ($ page> 1) and ($ page <$ page_count )){ $ Page_string = "<a href =". $ url ."? Page = 1> page 1 </a> | <a href = ". $ url ."? Page = ". ($ page-1)."> Previous page </a> | <a href = ". $ url ."? Page = ". ($ Page + 1). "> Next page </a> | <a href =". $ url ."? Page = ". $ page_count."> Last page </a> ";             } If ($ page = $ page_count ){ $ Page_string = "<a href =". $ url ."? Page = 1> page 1 </a> | <a href = ". $ url ."? Page = ". ($ page-1)."> Previous page </a> | next page | <a href = ". $ url ."? Page = ". $ page_count."> Last page </a> ";             }         } $ Page_str = $ page_string. (",". $ page. "/". $ page_count. "page "); Echo "<br> <p align = center>". $ page_str. "</p> ";     }     /** * Paging functions  * * @ Param int $ num: total number of records * @ Param int $ perpage: records on each page * @ Param int $ curpage: current page * @ Param string $ mpurl: path url * @ Param unknown_type $ hiddenFrom * @ Return string */ Function page ($ num, $ perpage, $ curpage, $ mpurl, $ hiddenFrom = ''){ $ Multipage = ''; // Restore $ Mpurl. = strpos ($ mpurl ,'? ')? '&':'? ';   If ($ num> $ perpage ){ $ Page = 10; $ Offset = 2;   $ Pages = @ ceil ($ num/$ perpage); // total number of pages   If ($ page> $ pages ){ $ From = 1; $ To = $ pages; } Else { // If the total number of pages is greater than 10 $ From = $ curpage-$ offset; // Current page-2 $ To = $ from + $ page-1; // Current page + 10-3   If ($ from <1 ){   $ To = $ curpage + 1-$ from; $ From = 1; If ($ to-$ from <$ page ){ $ To = $ page;                     } } Elseif ($ to> $ pages ){ $ From = $ pages-$ page + 1; $ To = $ pages;                 }             }   If ($ hiddenFrom ){ $ Multipage = ($ curpage-$ offset> 1 & $ pages> $ page? '<A href = "#"'. js_page ($ hiddenFrom, 1). '> homepage </a> ':''). ($ Curpage> 1? '<A href = "#"'. js_page ($ hiddenFrom, $ curpage-1). '> publish previous page </a> ':''); For ($ I = $ from; $ I <= $ to; $ I ++ ){ $ Multipage. = $ I ==$ curpage? '<Span>'. $ I. '</span> ': '<A href = "#"'. js_page ($ hiddenFrom, $ I). '>'. $ I. '</a> ';                 }   $ Multipage. = ($ curpage <$ pages? '<A href = "#"'. js_page ($ hiddenFrom, $ curpage + 1). '> Next Page › </a> ':''). ($ To <$ pages? '<A href = "#"'. js_page ($ hiddenFrom, $ pages). '> last page </a> ':''); $ Multipage = $ multipage? '<Div class = "list-page">'. $ multipage. '</div> ':''; } Else {   $ Multipage = ($ curpage-$ offset> 1 & $ pages> $ page? '<A href = "'. $ mpurl. 'page = 1"> homepage </a> ':''). ($ Curpage> 1? '<A href = "'. $ mpurl. 'Page = '. ($ curpage-1).'"> publish previous page </a> ':'');   For ($ I = $ from; $ I <= $ to; $ I ++ ){ $ Multipage. = $ I ==$ curpage? '<Span>'. $ I. '</span> ': '<A href = "'. $ mpurl. 'Page = '. $ I.'"> '. $ I.' </a> ';                 }   $ Multipage. = ($ curpage <$ pages? '<A href = "'. $ mpurl. 'Page = '. ($ curpage + 1).'"> Next page › </a> ':''). ($ To <$ pages? '<A href = "'. $ mpurl. 'Page = '. $ pages.'"> Last page </a> ':''); $ Multipage = $ multipage? '<Div class = "list-page">'. $ multipage. '</div> ':'';             }         } Return $ multipage;     } // No Function page_get_start ($ page, $ ppp, $ totalnum ){ $ Totalpage = ceil ($ totalnum/$ ppp ); $ Page = max (1, min ($ totalpage, intval ($ page ))); Return ($ page-1) * $ ppp;     } // No Function js_page ($ hiddenFrom, $ page)     { If ($ hiddenFrom ){ Return 'onclick = javascript: $ ("# page "). val ("'. $ page. '"); $ ("#'. $ hiddenFrom. '"). submit ();';         }     } }       ?>