Php paging functions [classic]-PHP source code

Ec (2); & lt ;? Php * & nbsp; paging Class & nbsp; designbyxqbar & nbsp; qq: 174171262 & nbsp; email: wxddong@163.com & nbsp; & nbsp; blog: www.xqbar.com & nbsp; input parameter & nbsp; si script ec (2); script

/*
Paging type
Design by xqbar
Qq: 174171262
Email: wxddong@163.com
Blog: http://www.xqbar.com
Input parameters
Size (number of records per page)
Url (connection address)
Style)
SQL (run Statement)
*/
Class page {
Public $ SQL = ''; // paging SQL statement
Public $ url = ''; // the address of the next page passed by page. You can add parameters to search and use them.
Public $ size = 10; // by default, 10 data entries are displayed on each page.
Public $ style = 1; // default paging display style
Private $ totalsize = 0; // total data volume
Private $ totalpage = 0; // total number of pages
Private $ page = 1; // current page
Private $ link; // database connection point
Private $ flag = false; // initialization flag
Private $ offset = 0; // The page offset value limit $ offset, $ size;
// Constructor transmits the database connection point
Function _ construct ($ link ){
$ This-> page = (isset ($ _ GET ['page']) &! Empty ($ _ GET ['page']) & (int) ($ _ GET ['page'])? (Int) $ _ GET ['page']: 1; // obtain the current page parameter value to determine the page number.
$ This-> link = $ link;
}
// Destructor
Function _ destruct (){
@ Mysql_close ($ this-> link );
$ This-> link = NULL;
}
// Constructor Function page ($ link ){
$ This->__ construct ($ link );
}
// Initialization
Function init (){
If (empty ($ this-> SQL) {$ this-> halt ("error warning: SQL statement cannot be blank! "); Exit () ;}// determines whether the SQL exists
$ This-> SQL = str_replace (SQL); // "> '@ _', DB_PREFIX, $ this-> SQL); // Replace the table prefix in SQL
$ This-> size = ($ this-> size <= 0 )? 10: $ this-> size; // the initial number of data entries per page.
$ This-> page = ($ this-> page <1 )? 1: $ this-> page; // current page number
# Optimize the total number of query records after the first page
// Here I used the first page view to query the database to obtain the total number of databases. When I click the next page, the database will not be queried. This may save some time (I think) when there is a large amount of data)
If ($ this-> page = 1 &&! Isset ($ _ GET ['tsize']) {
SQL "> $ result = @ mysql_query ($ this-> SQL );
$ This-> totalsize = @ mysql_num_rows ($ result );
@ Mysql_free_result ($ result );
} Else {
// The only drawback of the problem above is that the page is no longer correct after you manually change the tsize value in the address bar
$ This-> totalsize = (int) $ _ GET ['tsize'];
}
$ This-> url = (empty ($ this-> url ))? $ _ SERVER ['php _ SELF '].'? Tsize = '. $ this-> totalsize: $ this-> url.' & tsize = '. $ this-> totalsize; // pass totalsize to the next page
$ This-> totalpage = ceil ($ this-> totalsize/$ this-> size); // obtain the total number of pages
$ This-> page = ($ this-> page> $ this-> totalpage )? $ This-> totalpage: $ this-> page;
$ This-> offset = ($ this-> page-1) * $ this-> size; // get the offset Value
}
// Query the results returned by the database to a two-dimensional array
Function fetch_array ($ result_type = MYSQL_BOTH ){
If (! $ This-> flag) {$ this-> init (); $ this-> flag = true ;}
If ($ this-> totalsize <= 0) {return NULL ;}
$ This-> SQL. = "limit $ this-> offset, $ this-> size ";
SQL, $ this-> link "> $ result = @ mysql_query ($ this-> SQL, $ this-> link );
While ($ row = mysql_fetch_array ($ result, $ result_type) {$ rows [] = $ row ;}
@ Mysql_free_result ($ result );
Return $ rows;
}
// Obtain the total data count
Function getsize (){
If (! $ This-> flag) {$ this-init (); $ this-> flag = true;} // checks whether the initialization has been performed before this. If yes, the system returns the result directly (the same below)
Return $ this-> totalsize;
}
// Obtain the total number of pages
Function getpage (){
If (! $ This-> flag) {$ this-init (); $ this-> flag = true ;}
Return $ this-> totalpage;
}
// Output paging links based on input parameters
Function outpage (){
If (! $ This-> flag) {$ this-init (); $ this-> flag = true ;}
Switch ($ this-> style ){
#1 page x total page x previous page next page x/total page x
Case 1:
$ Pagehtml = "no.{$ This-> page}Total pages{$ This-> totalpage}Page ";
$ Pagehtml. = ($ this-> page = 1 )? "Homepage previous page": "url} & page = 1 '> homepage url} & page =". ($ this-> page-1). "'> previous page ";
$ Pagehtml. = ($ this-> page = $ this-> totalpage )? "Last page of the next page": "url} & page = ". ($ this-> page + 1 ). "'> next page url} & page ={$ this-> totalpage}'> last page ";
$ Pagehtml. = "Total{$ This-> totalsize}";
Break;
#1 homepage previous page next page last page x items/pages x pages
Case 2:
$ Pagehtml = "";
$ Pagehtml. = ($ this-> page = 1 )? "Homepage previous page": "url} & page = 1 '> homepage url} & page =". ($ this-> page-1). "'> previous page ";
$ Pagehtml. = ($ this-> page = $ this-> totalpage )? "Last page of the next page": "url} & page = ". ($ this-> page + 1 ). "'> next page url} & page ={$ this-> totalpage}'> last page ";
$ Pagehtml. = "Total{$ This-> totalsize}";
Break;
#2 1 2 3 4 5
Case 3:
$ Offset = (ceil ($ this-> page/10)-1) * 10;
$ Pagehtml = "";
If ($ offset! = 0) {$ pagehtml. = "url} & page = 1' >|< <url} & page = ". ($ this-> page-1 ). "'> <";}
For ($ I = 1; $ I <= 10; $ I ++ ){
$ N = $ I + $ offset;
If ($ n >$ this-> totalpage) {break ;}
If ($ n ==$ this-> page) {$ pagehtml. = "url} & page = $ n'>$ N";}
Else {$ pagehtml. = "url} & page = $ n'>$ N";}
}
If ($ n <$ this-> totalpage) {$ pagehtml. = "url} & page = ". ($ this-> page + 1 ). "'>>> url} & page = $ this-> totalsize' >>>| ";}
Unset ($ offset, $ I, $ n );
Break;
#1
Default:
$ Pagehtml = "page {$ this-> page} {$ this-> totalpage ";
$ Pagehtml. = ($ this-> page = 1 )? "Homepage previous page": "url} & page = 1 '> homepage url} & page =". ($ this-> page-1). "'> previous page ";
$ Pagehtml. = ($ this-> page = $ this-> totalpage )? "Last page of the next page": "url} & page = ". ($ this-> page + 1 ). "'> next page url} & page ={$ this-> totalpage}'> last page ";
Break;
}
Return $ pagehtml;
}
// Error output
Function halt ($ msg ){
Echo"";
Echo"";
Echo" \ R \ n ";
Echo"Error";
Echo"";
Echo"

";
Echo $ msg;
Echo"

";
Echo"";
}
}
?>

Require_once ('mysql. class. php ');
Require_once ('page. class. php ');
$ Db = new mysql ();
$ Link = $ db-> open ();
# Define SQL and url
$ SQL = 'select * from @ _ info'; (@ _ is the prefix of my table definition, which is replaced after the class is passed in)
$ Url = '';
$ Mypage = new page ($ link );
$ Mypage-> size = 10;
$ Mypage-> style = 3;
$ Mypage-> url = $ url;
$ Mypage-> SQL = $ SQL. "order by id desc ";
$ Ls = $ mypage-> fetch_array (MYSQL_ASSOC); // get the returned result.
If (count ($ ls) = 0 ){
Echo 'no result ';
} Else {
Foreach ($ ls as $ value ){
Echo $ value ['title'];
}
// Page number
Echo $ mypage-> outpage ();
}
?>