PHP paging reserved query Conditions

A simple paging. The query conditions can be retained. Custom paging address <? Phprequire_once ("Global. PHP "); function _ pageft ($ totle, $ displaypg = 20, $ url ='') {Global $ page, $ firstcount, $ pagenav, $ _ server; $ globals ["displaypg"] = $ displaypg; If (! $ Page) $ page = 1; if (! $ URL) {$ url = $ _ server ["request_uri"];} // URL analysis: $ parse_url = parse_url ($ URL ); // URL resolution $ url_query = $ parse_url ["query"]; // retrieve the URL query string if ($ url_query) {echo $ url_query. "<br>"; $ url_query = ereg_replace ("(^ | &) page = $ page", "", $ url_query ); $ url = str_replace ($ parse_url ["query"], "", $ URL); if ($ url_query) {$ URL. = $ url_query. "& page";} else {$ URL. = "page" ;}} else {$ URL. = "? Page ";}$ lastpg = Ceil ($ totle/$ displaypg); // The last page, also the total number of pages $ page = min ($ lastpg, $ page ); $ prepg = $ page-1; // Previous Page $ nextpg = ($ page = $ lastpg? 0: $ page + 1); // next page $ firstcount = ($ page-1) * $ displaypg; // start pagination navigation bar code: $ pagenav = "show the <B> ". ($ totle? ($ Firstcount + 1): 0 ). "</B>-<B> ". min ($ firstcount + $ displaypg, $ totle ). "</B> records, total $ totle records"; // if there is only one page, the function jumps out: if ($ lastpg <= 1) return false; $ pagenav. = "<a href = '$ url = 1'> homepage </a>"; if ($ prepg) $ pagenav. = "<a href = '$ url = $ prepg'> previous page </a>"; else $ pagenav. = "Previous Page"; if ($ nextpg) $ pagenav. = "<a href = '$ url = $ nextpg'> next page </a>"; else $ pagenav. = "back page"; $ pagenav. = "<a href = '$ url = $ lastpg'> last page </> "; // The drop-down Jump list. All page numbers are displayed cyclically: $ pagenav. = "to the <select name = 'topage' size = '1' onchange = 'window. location = \ "$ url = \" + this. value '> \ n "; for ($ I = 1; $ I <= $ lastpg; $ I ++) {if ($ I = $ page) $ pagenav. = "<option value = '$ I' selected> $ I </option> \ n"; else $ pagenav. = "<option value = '$ I'> $ I </option> \ n" ;}$ pagenav. = "<lect> page, $ lastpg page in total" ;}$ page =$ _ Get ["page"]; $ result = $ db-> query ("select * From regsip"); $ Total = My SQL _num_rows ($ result); // call pageft (). 10 messages are displayed on each page (this parameter can be omitted when the default value is 20). Use the URL on this page (default, so omitted ). _ Pageft ($ total, 5); echo $ pagenav; $ result = $ db-> query ("select * From regsip limit $ firstcount, $ displaypg "); while ($ ROW = mysql_fetch_array ($ result) {?> <Table width = 500 border = "1" cellpadding = "5" cellspacing = "1" bgcolor = "# add3ef"> <tr bgcolor = "# eff3ff"> <TD> name: <? = $ Row [loginname]?> </TD> </tr> </table> <?}?>