Php paging programmer-PHP source code

Ec (2); classPage {& nbsp; publicparam & nbsp; public $ pageName & nbsp; page; & nbsp; default page tag, that is, filename. php? PageName & nbsp; & script ec (2); script in pageName4

Class Page {
// Public param
Public $ pageName = 'page'; // default page tag, that is, filename. php? PageName = 4
Public $ prevPage = '<'; // Previous Page
Public $ nextPage = '>'; // next page
Public $ prevBar = '<'; // The last page
Public $ nextBar = '>'; // next page
// Private param
Private $ _ totalNums = 1; // total number of records
Private $ _ barNum = 10; // Number of pagination entries displayed
Private $ _ totalPage = 0; // total number of pages
Private $ _ nowPage = 1; // current page
Private $ _ perPage = 10; // number of records displayed on each page
Private $ _ preUrl = ''; // url prefix
Private $ _ preNow = 0; // The number of pages displayed before the current page (the range should be 0 to $ _ barNum-1)
Private $ _ fromPage = 0; // the start point of the paging entry
Private $ _ toPage = 0; // The end of the page
Private $ _ offset = 0; // SQL query record offset
// Public functions -----------------------------------------------------------------
// Initiate the paging variable of the constructor
// @ Param $ nums int total number of records
// @ Param $ per int number of records per page
// @ Param $ now int current page number
// @ Param $ url string url prefix blank by default
Public function _ construct ($ nums, $ per = '', $ preNow ='', $ barNum = '', $ now ='', $ url = ''){
// Initialization
$ This-> _ set ($ nums, $ per, $ preNow, $ barNum, $ now, $ url );
$ This-> _ totalPage = ceil ($ this-> _ totalNums/$ this-> _ perPage );
$ This-> _ offset = ($ this-> _ nowPage-1) * $ this-> _ perPage;
}
// Previous Page
Public function getPrevPage (){
// The current page is not the first page
If ($ this-> _ nowPage> 1 ){
Return $ this-> _ setLink ($ this-> _ setUrl ($ this-> _ nowPage-1), $ this-> prevPage, 'prevpage ');
}
}
// Next page
Public function getNextPage (){
// The current page is smaller than the total number of pages
If ($ this-> _ nowPage <$ this-> _ totalPage ){
Return $ this-> _ setLink ($ this-> _ setUrl ($ this-> _ nowPage + 1), $ this-> nextPage, 'nextpage ');
}
}
// Page 1
Public function getFirstPage (){
// The start point is not the first page
If ($ this-> _ nowPage-$ this-> _ preNow)> 1 ){
Return $ this-> _ setLink ($ this-> _ setUrl (1), '1... ', 'firstpage ');
}
}
// Last page
Public function getLastPage (){
// The end is not equal to the total number of pages
If ($ this-> _ nowPage-$ this-> _ preNow + $ this-> _ barNum) <= $ this-> _ totalPage ){
Return $ this-> _ setLink ($ this-> _ setUrl ($ this-> _ totalPage ),'... '. $ this-> _ totalPage, 'lastpage ');
}
}
// Previous Page
Public function getPrevBar (){
// The start point is greater than the number of pages.
If ($ this-> _ nowPage-$ this-> _ preNow)> $ this-> _ barNum ){
Return $ this-> _ setLink ($ this-> _ setUrl ($ this-> _ nowPage-$ this-> _ preNow)-$ this-> _ barNum ), $ this-> prevBar, 'prevbar ');
}
}
// Next page
Public function getNextBar (){
// The end is not equal to the total number of pages
If ($ this-> _ nowPage-$ this-> _ preNow + $ this-> _ barNum) <= $ this-> _ totalPage ){
Return $ this-> _ setLink ($ this-> _ setUrl ($ this-> _ fromPage + $ this-> _ barNum), $ this-> nextBar, 'nextar ');
}
}
// Pagination bar
Public function pageBar (){
// Initialize the start and end endpoints of the paging bar
$ This-> _ toPage = $ this-> _ nowPage + ($ this-> _ barNum-$ this-> _ preNow-1 );
If ($ this-> _ toPage> $ this-> _ totalPage ){
$ This-> _ preNow = $ this-> _ barNum-($ this-> _ totalPage-$ this-> _ nowPage + 1 );
$ This-> _ toPage = $ this-> _ totalPage;
}
If ($ this-> _ toPage <$ this-> _ barNum ){
$ This-> _ toPage = $ this-> _ barNum;
}
$ This-> _ fromPage = $ this-> _ nowPage-$ this-> _ preNow;
If ($ this-> _ fromPage <1 ){
$ This-> _ fromPage = 1;
}
// Initialize the paging bar
$ Return = '';
For ($ I = $ this-> _ fromPage; $ I <= $ this-> _ toPage; $ I ++ ){
If ($ I! = $ This-> _ nowPage ){
$ Return. = $ this-> _ setLink ($ this-> _ setUrl ($ I), $ I, 'page ');
} Else {
$ Return. = ''. $ I .'';
}
}
Return $ return;
}
// Return offset for SQL query
Public function getOffset (){
Return $ this-> _ offset;
}
// The total number of returned records
Public function getTotalNums (){
Return ''. $ this-> _ totalNums .'';
}
// Display the page
Public function showPage (){
Return $ this-> getTotalNums (). $ this-> getFirstPage (). $ this-> getPrevBar (). $ this-> getPrevPage (). $ this-> pageBar (). $ this-> getNextPage (). $ this-> getNextBar (). $ this-> getLastPage ();
}
// Private functions ----------------------------------------------------------------
//
Private function _ set ($ nums, $ per, $ preNow, $ barNum, $ now, $ url ){
// Set the total number of records
If ($ nums> 0 ){
$ This-> _ totalNums = $ nums;
}
// Set the number of records displayed on each page
If ($ per> 0 ){
$ This-> _ perPage = $ per;
}
// Set the number of pages displayed before the current page
If ($ preNow> 0 ){
$ This-> _ preNow = $ preNow;
}
// Set the number of paging links
If ($ barNum> 0 ){
$ This-> _ barNum = $ barNum;
}
// Set the current page
If (empty ($ now )){
// Automatically obtain
If (isset ($ _ GET [$ this-> pageName]) {
$ This-> _ nowPage = intval ($ _ GET [$ this-> pageName]);
}
} Else {
// $ Now handled manually
$ This-> _ nowPage = intval ($ now );//
}
// Set the url prefix
If (! Empty ($ url )){
// $ The url has been manually processed
$ This-> _ preUrl = $ url. (stristr ($ url ,'? ')? '&':'? '). $ This-> pageName.' = ';
} Else {
// Automatically obtain
If (empty ($ _ SERVER ['query _ string']) {
// No query exists in the url
$ This-> _ preUrl = $ _ SERVER ['request _ URI '].'? '. $ This-> pageName.' = ';
} Else {
If (stristr ($ _ SERVER ['query _ string'], $ this-> pageName. '= ')){
// Page = n (2, 3...) is found in the query ...)
$ This-> _ preUrl = str_replace ($ this-> pageName. '= '. $ this-> _ nowPage, '', $ _ SERVER ['request _ URI ']);
$ LastCharacter = $ this-> _ preUrl [strlen ($ this-> _ preUrl)-1];
If ($ lastCharacter = '? '| $ LastCharacter = '&'){
// Page = n (2, 3...) at the end of the original url
$ This-> _ preUrl. = $ this-> pageName. '= ';
} Else {
// Page = n (2, 3...) is not at the end of the original url
$ This-> _ preUrl. = '&'. $ this-> pageName. '= ';
}
} Else {
// No page = n (2, 3...) is found in the query ...)
$ This-> preUrl = $ _ SERVER ['request _ URI '].' & '. $ this-> pageName.' = ';
}
}
}
}
// Set the link address
Private function _ setUrl ($ pageNo ){
Return $ this-> _ preUrl. $ pageNo;
}
// Set the link
Private function _ setLink ($ url, $ link, $ style = ''){
$ Style = 'class = "'. $ style .'"';
Return ''. $ link .'';
}
}
//

Usage

$ Total = 1245;
// Class Page ($ nums, $ per = '', $ preNow ='', $ barNum = '', $ now ='', $ url = '')
$ Page = new Page ($ total );
$ Pager = $ page-> showPage ();
$ Smarty-> assign ('pager', $ pager );
$ Smarty-> display ('index. tpl ');