A simple generic paging class written by myself-php Tutorial

A simple generic paging class written by a user

Simple paging class written by php for personal learning, with strong versatility /** * Simple paging class * @ Author: phpprince * @ QQ: 8923052. * @ Date: 21:08:35 */ Class Page { Protected $ url; // address Protected $ allnum; // total number of records Protected $ current; // current page number Protected $ pagesize; // number of records displayed on each page Protected $ postfix; // suffix Protected $ style; // A total of three display styles. 1 2 3 represents the first 5, the last 4, the last 3, and the last 4, respectively. Public function _ construct ($ url, $ allnum, $ current, $ pagesize = 10, $ postfix = '', $ style = 1 ){ $ This-> url = $ url; $ This-> allnum = $ allnum; $ This-> current = $ current; $ This-> pagesize = $ pagesize; $ This-> postfix = $ postfix; $ This-> style = $ style; } // Obtain the total number of pages Protected function maxPageNum (){ $ Max = ceil ($ this-> allnum/$ this-> pagesize ); // Page number exceeding correction If ($ this-> current> $ max ){ $ This-> current = $ max; } If ($ this-> current <1 ){ $ This-> current = 1; } Return $ max; } // Obtain the complete html str link on the first page Protected function firstUrl (){ If ($ this-> current! = 1) { Return 'geturl (1). '"title =" View first Page "> homepage '; } Else { Return 'homepage '; } } // Obtain the complete html str link of the previous page Protected function prevUrl (){ If ($ this-> current <= 1 ){ $ Fullurl = 'preview '; } Else { $ Fullurl = $ this-> url. ($ this-> current-1). $ this-> postfix; $ Fullurl = 'preview '; } Return $ fullurl; } // Obtain the link of the next page. complete html str Protected function nextUrl (){ If ($ this-> current >=$ this-> maxPageNum ()){ $ Fullurl = 'next page '; } Else { $ Fullurl = $ this-> url. ($ this-> current + 1). $ this-> postfix; $ Fullurl = 'next page '; } Return $ fullurl; } // Obtain the complete html str link on the last page Protected function lastUrl (){ If ($ this-> current >=$ this-> maxPageNum ()){ $ Fullurl = 'Last page '; } Else { $ Fullurl = $ this-> url. $ this-> maxPageNum (). $ this-> postfix; $ Fullurl = 'Last page '; } Return $ fullurl; } // Obtain the complete url of the specified page number Protected function getUrl ($ pageno ){ Return $ this-> url. $ pageno. $ this-> postfix; } // Specify the display style Protected function getStyle (){ Switch ($ this-> style ){ Case 1: $ Before = 5; $ After = 4; Break; Case 2: $ Before = 3; $ After = 3; Break; Case 3: $ Before = 4; $ After = 4; Break; Default: $ Before = 5; $ After = 4; } Return array ($ before, $ after ); } // Obtain the intermediate URL 1 2 3 4 5 6 7 8 9 10 Protected function getMiddelUrl (){ $ Max = $ this-> maxPageNum (); // obtain the total page first to check whether the current page has exceeded the limit. $ Current = $ this-> current; // The current page number must be valid to ensure that the following page number ranges are correct. // Obtain the current style List ($ before, $ after) = $ this-> getStyle (); $ Startno = $ current-$ before; // start page number $ Endno = $ current + $ after; // end page number // To ensure that the output always meets the requirements, when the page is not exceeded, the start page must be added, and vice versa. While ($ endno> $ max | $ startno <1 ){ If ($ endno> $ max) {// ends the page number exceeding the limit $ Endno --; If ($ startno> 1 ){ $ Startno --; } } If ($ startno <1) {// the starting page number is out of bounds. $ Startno ++; If ($ endno <$ max ){ $ Endno ++; } } } $ Str = ''; // used to save the entire html str For ($ I = $ startno; $ I <= $ endno; $ I ++ ){ $ Currenturl = $ this-> getUrl ($ I ); If ($ I! = $ Current ){ $ Str. = "{$ I }"; } Else { $ Str. = ''. $ I .''; } } Return $ str; } // Returns the complete pagination html string Public function getPageStr (){ $ Str =' '. $ This-> firstUrl (). $ this-> prevUrl (); $ Str. = $ this-> getMiddelUrl (); $ Str. = $ this-> nextUrl (). $ this-> lastUrl (). 'col '. $ this-> maxPageNum (). 'page '. $ this-> allnum. 'entries '; Return $ str; } } ?>