Php Generic paging code, like goolge paging style-php Tutorial

Php Generic paging code, similar to goolge paging style

/** ** Generic php paging class. (Like Google style) ** You only need to provide two parameters: the total number of records and the number of records displayed on each page. (Detailed instructions are provided ..) ** You do not need to specify a URL. the link is generated by the program. It is convenient for querying results by page. ** The form is submitted using the GET method, which ensures that URL parameters are not lost in operations such as query and deletion. **/ Class Pager { // IE address bar Var $ url; // The total number of records Var $ countall; // Total number of pages Var $ page; // Pagination numeric link Var $ thestr; // Home page and previous page Var $ backstr; // Link to the last page and Next page Var $ nextstr; // Current page number Var $ pg; // Number of records displayed per page Var $ countlist; // Flip style Var $ style; // Constructor. This function is automatically executed when the class is instantiated. Function Pager ($ countall, $ countlist, $ style = "page "){ // When the number of records is different from the number displayed on each page, add 1 after the remaining number of pages $ This-> countall = $ countall; $ This-> countlist = $ countlist; $ This-> style = $ style; If ($ this-> countall % $ this-> countlist! = 0 ){ $ This-> page = sprintf ("% d", $ this-> countall/$ this-> countlist) + 1; } Else { $ This-> page = $ this-> countall/$ this-> countlist; } $ This-> pg =$ _ GET ["pg"]; // Ensure that pg starts from page 1st if not specified If (! Ereg ("^ [1-9] [0-9] * $", $ this-> pg) | empty ($ this-> pg )){ $ This-> pg = 1; } // The page number exceeds the maximum value. If ($ this-> pg >$ this-> page ){ $ This-> pg = $ this-> page; } // Obtain the current URL. For specific implementation, see the function entity at the bottom. $ This-> url = Pager: getUrl (); // Replace the page number with the correct format If (isset ($ _ GET ["pg"]) & $ _ GET ["pg"]! = $ This-> pg ){ $ This-> url = str_replace ("? Pg = ". $ _ GET [" pg "],"? Pg = $ this-> pg ", $ this-> url ); $ This-> url = str_replace ("& pg = ". $ _ GET ["pg"], "& pg = $ this-> pg", $ this-> url ); } // Generate a page with numbers such as 12345. If ($ this-> page <= 10 ){ For ($ I = 1; $ I <$ this-> page + 1; $ I ++ ){ $ This-> thestr = $ this-> thestr. Pager: makepg ($ I, $ this-> pg ); } } Else { If ($ this-> pg <= 5 ){ For ($ I = 1; $ I <10; $ I ++ ){ $ This-> thestr = $ this-> thestr. Pager: makepg ($ I, $ this-> pg ); } } Else { If (6 + $ this-> pg <= $ this-> page ){ For ($ I = $ this-> PG-4; $ I <$ this-> pg + 6; $ I ++ ){ $ This-> thestr = $ this-> thestr. Pager: makepg ($ I, $ this-> pg ); } } Else { For ($ I = $ this-> PG-4; $ I <$ this-> page + 1; $ I ++ ){ $ This-> thestr = $ this-> thestr. Pager: makepg ($ I, $ this-> pg ); } } } } // Generate text links such as the top and bottom pages $ This-> backstr = Pager: gotoback ($ this-> pg ); $ This-> nextstr = Pager: gotonext ($ this-> pg, $ this-> page ); // Echo ("total ". $ this-> countall. "entries, per page ". $ this-> countlist. "entries, total ". $ this-> page. "page ". $ this-> backstr. $ this-> thestr. $ this-> nextstr ); } // Auxiliary function for generating digital paging Function makepg ($ I, $ pg ){ If ($ I = $ pg ){ Return "style." '> ". $ I .""; } Else { Return "url, 5, $ I)." class = '". $ this-> style."'>". $ I .""; } } // Function for generating information such as the previous page Function gotoback ($ pg ){ If ($ PG-1> 0 ){ Return $ this-> gotoback = "url, 3, 0 ). "class = '". $ this-> style. "'> homepage url, 2, 0 ). "class = '". $ this-> style. "'> Previous Page "; } Else { Return $ this-> gotoback = "style." '> homepage previous page "; } } // Function for generating information such as the next page Function gotonext ($ pg, $ page ){ If ($ pg <$ page ){ Return "url, 1, 0 ). "class = '". $ this-> style. "'> Next Page url, 4, 0 ). "class = '". $ this-> style. "'> last page "; } Else { Return "style." '> last page of the next page "; } } Bbs.it-home.org // Process the $ pg method in the url, which is used to automatically generate pg = x Function replacepg ($ url, $ flag, $ I ){ If ($ flag = 1 ){ $ Temp_pg = $ this-> pg; Return str_replace ("pg =". $ temp_pg, "pg =". ($ this-> pg + 1), $ url ); } Else if ($ flag = 2 ){ $ Temp_pg = $ this-> pg; Return str_replace ("pg =". $ temp_pg, "pg =". ($ this-> PG-1), $ url ); } Else if ($ flag = 3 ){ $ Temp_pg = $ this-> pg; Return str_replace ("pg =". $ temp_pg, "pg = 1", $ url ); } Else if ($ flag = 4 ){ $ Temp_pg = $ this-> pg; Return str_replace ("pg =". $ temp_pg, "pg =". $ this-> page, $ url ); } Else if ($ flag = 5 ){ $ Temp_pg = $ this-> pg; Return str_replace ("pg =". $ temp_pg, "pg =". $ I, $ url ); } Else { Return $ url; } } // Obtain the current URL Function getUrl (){ $ Url = "http: //". $ _ SERVER ["HTTP_HOST"]; If (isset ($ _ SERVER ["REQUEST_URI"]) { $ Url. = $ _ SERVER ["REQUEST_URI"]; } Else { $ Url. = $ _ SERVER ["PHP_SELF"]; If (! Empty ($ _ SERVER ["QUERY_STRING"]) { $ Url. = "? ". $ _ SERVER [" QUERY_STRING "]; } } // Add pg = x to the current URL If (! Ereg ("(pg = | PG = | pG = | Pg =)", $ url )){ If (! Strpos ($ url ,"? ")){ $ Url = $ url ."? Pg = 1 "; } Else { $ Url = $ url. "& pg = 1 "; } } Return $ url; } } ?>