Php classic paging code class

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Class page { Var $ page_name = "page "; Var $ next_page = 'next page '; Var $ pre_page = 'previous page '; Var $ first_page = 'homepage '; Var $ last_page = 'end page '; Var $ pre_bar = '<'; Var $ next_bar = '> '; Var $ format_left = ''; Var $ format_right = ''; Var $ pagebarnum = 5; Var $ totalpage = 0; Var $ nowindex = 1; Var $ url = ""; Var $ offset = 0; Var $ rewrite = array (); Function page ($ array)  { If (is_array ($ array )){ If (! Array_key_exists ('total', $ array) $ this-> error (_ function __, 'need a param of total '); $ Total = intval ($ array ['total']); $ Perpage = (array_key_exists ('perpage', $ array ))? Intval ($ array ['perpage']): 10; $ Nowindex = (array_key_exists ('nowindex ', $ array ))? Intval ($ array ['nowindex ']): ''; $ Url = (array_key_exists ('URL', $ array ))? $ Array ['URL']: ''; $ Action = (array_key_exists ('action', $ array ))? $ Array ['action']: ''; $ Id0 = (array_key_exists ('id0', $ array ))? $ Array ['id0']: ''; $ Id1 = (array_key_exists ('id1', $ array ))? $ Array ['id1']: ''; $ Id2 = (array_key_exists ('id2', $ array ))? $ Array ['id2']: ''; $ Id3 = (array_key_exists ('id3 ', $ array ))? $ Array ['id3 ']: ''; } Else { $ Total = $ array; $ Perpage = 10; $ Nowindex = ''; $ Url = ''; $ Action = ''; $ Id0 = ''; $ Id1 = ''; $ Id2 = ''; $ Id3 = '';   } If ((! Is_int ($ total) | ($ total <0) $ this-> error (_ function __, $ total. 'is not a positive integer! '); If ((! Is_int ($ perpage) | ($ perpage <= 0) $ this-> error (_ function __, $ perpage. 'is not a positive integer! '); If (! Empty ($ array ['page _ name']) $ this-> set ('page _ name', $ array ['page _ name']); $ This-> _ set_nowindex ($ nowindex ); $ This-> _ set_url ($ url ); $ This-> totalpage = ceil ($ total/$ perpage ); $ This-> offset = ($ this-> nowindex-1) * $ perpage; $ This-> action = $ action; $ This-> rewrite = array ('action' => $ action, 'id0' => $ id0, 'id1' => $ id1, 'id2' => $ id2, 'id3 '=> $ id3 );  } Function set ($ var, $ value)  { If (in_array ($ var, get_object_vars ($ this ))) $ This-> $ var = $ value; Else { $ This-> error (_ function __, $ var. "does not belong to pb_page! ");   }  } Function next_page ($ style = ''){ If ($ this-> nowindex <$ this-> totalpage ){ Return $ this-> _ get_link ($ this-> _ get_url ($ this-> nowindex + 1), $ this-> next_page, $ style );  } Return '<a class = "'. $ style. '">'. $ this-> next_page. '</a> ';  } Function pre_page ($ style = ''){ If ($ this-> nowindex> 1 ){ Return $ this-> _ get_link ($ this-> _ get_url ($ this-> nowindex-1), $ this-> pre_page, $ style );   } Return '<a class = "'. $ style. '">'. $ this-> pre_page. '</a> ';  } Function first_page ($ style = ''){ If ($ this-> nowindex = 1 ){ Return '<a class = "'. $ style. '">'. $ this-> first_page. '</a> ';   } Return $ this-> _ get_link ($ this-> _ get_url (1), $ this-> first_page, $ style );  } Function last_page ($ style = ''){ If ($ this-> nowindex = $ this-> totalpage | $ this-> totalpage = 0 ){ Return '<a class = "'. $ style. '">'. $ this-> last_page. '</a> ';   } Return $ this-> _ get_link ($ this-> _ get_url ($ this-> totalpage), $ this-> last_page, $ style );  } Function nowbar ($ style = '', $ nowindex_style = '')  { $ Plus = ceil ($ this-> pagebarnum/2 ); If ($ this-> pagebarnum-$ plus + $ this-> nowindex> $ this-> totalpage) $ plus = ($ this-> pagebarnum-$ this-> totalpage + $ this-> nowindex ); $ Begin = $ this-> nowindex-$ plus + 1; $ Begin = ($ begin> = 1 )? $ Begin: 1; $ Return = ''; For ($ I = $ begin; $ I <$ begin + $ this-> pagebarnum; $ I ++)   { If ($ I <= $ this-> totalpage ){ If ($ I! = $ This-> nowindex) $ Return. = $ this-> _ get_text ($ this-> _ get_link ($ this-> _ get_url ($ I), $ I, $ style )); Else $ Return. = $ this-> _ get_text ('<a class = "'. $ nowindex_style. '">'. $ I. '</a> '); } Else { Break;    } $ Return. = "";   } Unset ($ begin ); Return $ return;  } /** * Get the code for displaying the jump button   * * @ Return string */ Function select ()  { $ Return = '<select name = "pb_page_select"> '; For ($ I = 1; $ I <= $ this-> totalpage; $ I ++)   { If ($ I ==$ this-> nowindex ){ $ Return. = '<option value = "'. $ I. '" selected>'. $ I. '</option> '; } Else { $ Return. = '<option value = "'. $ I. '">'. $ I. '</option> ';    }   } Unset ($ I ); $ Return. = '</select> '; Return $ return;  }   /** * Obtain the limit value in the mysql tutorial statement.   * * @ Return string */ Function offset ()  { Return $ this-> offset;  }   /** * Control the display style by page (you can add the corresponding style)   * * @ Param int $ mode * @ Return string */ Function show ($ mode = 1)  { Switch ($ mode)   { Case '1 ': $ This-> next_page = 'next page '; $ This-> pre_page = 'previous page '; Return $ this-> pre_page (). $ this-> nowbar (). $ this-> next_page (). 'Di '. $ this-> select (). 'Page '; Break; Case '2 ': $ This-> next_page = 'next page '; $ This-> pre_page = 'previous page '; $ This-> first_page = 'homepage '; $ This-> last_page = 'Last page '; Return $ this-> first_page (). $ this-> pre_page (). '[nth '. $ this-> nowindex. 'page] '. $ this-> next_page (). $ this-> last_page (). 'Di '. $ this-> select (). 'Page '; Break; Case '3 ': $ This-> next_page = 'next page '; $ This-> pre_page = 'previous page '; $ This-> first_page = 'homepage '; $ This-> last_page = 'Last page '; Return $ this-> first_page ("page_box "). "". $ this-> pre_page ("page_box "). "". $ this-> nowbar ("page_box_a", "page_box_ B "). "". $ this-> next_page ("page_box "). "". $ this-> last_page ("page_box "). "<a class =" clear "> </a> "; Break; Case '4 ': $ This-> next_page = 'next page '; $ This-> pre_page = 'previous page '; Return $ this-> pre_page (). $ this-> nowbar (). $ this-> next_page (); Break; Case '5 ': Return $ this-> pre_bar (). $ this-> pre_page (). $ this-> nowbar (). $ this-> next_page (). $ this-> next_bar (); Break;   }    } Function _ set_url ($ url = "")  { If (! Empty ($ url )){ $ This-> url = $ url. (stristr ($ url ,'? '))? '&':'? '). $ This-> page_name. "= "; } Else { If (empty ($ _ server ['query _ string']) { $ This-> url = $ _ server ['request _ uri ']. "? ". $ This-> page_name." = "; } Else { If (stristr ($ _ server ['query _ string'], $ this-> page_name. '= ')){ $ This-> url = str_replace ($ this-> page_name. '='. $ this-> nowindex, '', $ _ server ['request _ uri ']); $ Last = $ this-> url [strlen ($ this-> url)-1]; If ($ last = '? '| $ Last = '&'){ $ This-> url. = $ this-> page_name. "= "; } Else { $ This-> url. = '&'. $ this-> page_name. "= ";      } } Else { $ This-> url = $ _ server ['request _ uri '].' & '. $ this-> page_name.' = ';     }    }   }  } Function _ set_nowindex ($ nowindex)  { If (empty ($ nowindex )){ If (isset ($ _ get [$ this-> page_name]) { $ This-> nowindex = intval ($ _ get [$ this-> page_name]);    } } Else { $ This-> nowindex = intval ($ nowindex );   }  } Function _ get_url ($ pageno = 1)  { Global $ _ cfg; $ Arr = $ this-> rewrite; // Print_r ($ arr ); // Print_r ($ this-> url. $ pageno ); If ($ _ cfg ['urlrewrite'] &! Empty ($ arr ['action']) { Return url_rewrite ($ arr ['action'], array ('id0' => $ arr ['id0'], 'id1' => $ arr ['id1'], 'id2' => $ arr ['id2'], 'id3 '=> $ arr ['id3'], 'page' => $ pageno )); } Else { Return $ this-> url. $ pageno;   }  } Function _ get_text ($ str)  { Return $ this-> format_left. $ str. $ this-> format_right;  } Function _ get_link ($ url, $ text, $ style = ''){ $ Style = (empty ($ style ))? '': 'Class =" '. $ style .'"'; Return '<a'. $ style. 'Href = "'. $ url.'"> '. $ text.' </a> ';  } Function error ($ function, $ errormsg)  { Die ('error in file <B> '. _ file __. '</B>, function <B> '. $ function. '() </B> :'. $ errormsg );  } } ?>