分頁不適用於條件

Question

表格名稱-新聞

我創建分頁代碼

在這里，我從導航欄傳遞城市和州。 在此基礎上，我嘗試顯示帶有分頁的Row。

它可以工作，但是在2,3,4,5 ... N頁上顯示錯誤。

簡單分頁不使用where條件獲取數據。 請提出適當的解決方案。

當頁面加載時，它的URL像

本地主機/印地文/ city.php？狀態= 19＆城市= 16

並在下面顯示分頁行。

但是當我點擊第2頁時，它會顯示網址

本地主機/印地文/ city.php？頁= 2

並顯示

錯誤

未定義索引：城市

未定義索引：狀態

導航代碼

<li><a href='city.php?state=20&city=18'>Bhopal</a></li>
  <li><a href='city.php?state=20&city=19'>Indore</a></li>

和其他帶有分頁代碼的php代碼

<?php 
require_once('includes/config.php');
$Admin = new admins;
$baseString = "detail.php";
$cit = $_REQUEST['city'];
$sta = $_REQUEST['state'];
?>

<?php           
$page = (int) (!isset($_GET["page"]) ? 1 : $_GET["page"]);
$limit = 1;
$startpoint = ($page * $limit) - $limit;
$statement = "news";
?>
<?php
mysql_set_charset('utf8');
$sql="select id,story,headline,photo from {$statement} where state_id = '$sta' and city_id = '$cit' order by id desc LIMIT {$startpoint} , {$limit}";
$query=mysql_query($sql);
?>

//代碼以顯示頁面

<?php echo $Admin->pagination($statement,$limit,$page); ?>

分頁功能

function pagination($query, $per_page = 10,$page = 1, $url = '?')
        {        
        $query = "SELECT COUNT(*) as `num` FROM {$query}";
        //print_r($query);
        //exit;
        $row = mysql_fetch_array(mysql_query($query));
        $total = $row['num'];
        $adjacents = "2"; 

        $page = ($page == 0 ? 1 : $page);  
        $start = ($page - 1) * $per_page;                               

        $prev = $page - 1;                          
        $next = $page + 1;
        $lastpage = ceil($total/$per_page);
        $lpm1 = $lastpage - 1;

        $pagination = "";
        if($lastpage > 1)
        {   
            $pagination .= "<ul class='pagination'>";
                    $pagination .= "<li class='details'>Page $page of $lastpage</li>";
            if ($lastpage < 7 + ($adjacents * 2))
            {   
                for ($counter = 1; $counter <= $lastpage; $counter++)
                {
                    if ($counter == $page)
                        $pagination.= "<li><a class='current'>$counter</a></li>";
                    else
                        $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                }
            }
            elseif($lastpage > 5 + ($adjacents * 2))
            {
                if($page < 1 + ($adjacents * 2))        
                {
                    for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
                    {
                        if ($counter == $page)
                            $pagination.= "<li><a class='current'>$counter</a></li>";
                        else
                            $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                    }
                    $pagination.= "<li class='dot'>...</li>";
                    $pagination.= "<li><a href='{$url}page=$lpm1'>$lpm1</a></li>";
                    $pagination.= "<li><a href='{$url}page=$lastpage'>$lastpage</a></li>";      
                }
                elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
                {
                    $pagination.= "<li><a href='{$url}page=1'>1</a></li>";
                    $pagination.= "<li><a href='{$url}page=2'>2</a></li>";
                    $pagination.= "<li class='dot'>...</li>";
                    for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
                    {
                        if ($counter == $page)
                            $pagination.= "<li><a class='current'>$counter</a></li>";
                        else
                            $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                    }
                    $pagination.= "<li class='dot'>..</li>";
                    $pagination.= "<li><a href='{$url}page=$lpm1'>$lpm1</a></li>";
                    $pagination.= "<li><a href='{$url}page=$lastpage'>$lastpage</a></li>";      
                }
                else
                {
                    $pagination.= "<li><a href='{$url}page=1'>1</a></li>";
                    $pagination.= "<li><a href='{$url}page=2'>2</a></li>";
                    $pagination.= "<li class='dot'>..</li>";
                    for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
                    {
                        if ($counter == $page)
                            $pagination.= "<li><a class='current'>$counter</a></li>";
                        else
                            $pagination.= "<li><a href='{$url}page=$counter'>$counter</a></li>";                    
                    }
                }
            }

            if ($page < $counter - 1){ 
                $pagination.= "<li><a href='{$url}page=$next'>Next</a></li>";
                $pagination.= "<li><a href='{$url}page=$lastpage'>Last</a></li>";
            }else{
                $pagination.= "<li><a class='current'>Next</a></li>";
                $pagination.= "<li><a class='current'>Last</a></li>";
            }
            $pagination.= "</ul>\n";        
        }


        return $pagination;
    }

}
?>

Answer 1

在網址localhost/hindi/city.php?page=2 ，沒有city變量，因此未定義$_REQUEST['city'] 。
state變量也是一樣。

Answer 2

嘗試這個：

if there are no page then 
let
page=1
limit=1
now startpoint=(1*1)-1=0 //correct

if you use 

page=2
then
SP=(2*1)-1=1 // one is start point and one is limit ?

i think its correct 

show me error message.. PLZ

Answer 3

in method pagination($statement,$limit,$page) 
you pass only 3 variable but in method required constant 4 variable

for optionaly variable use 

example

function($var=null,$var2=null){
/*....your program....*/
}
now you can call
function();
function($arg1);
function($arg1,$arg2);

Answer 4

你有兩個選擇

1. 您需要在分頁方法中傳遞完整的url（除$ page以外的所有參數）

   分頁（$聲明，$限制，$頁， '？city.php狀態= 20＆城市= 18'）; ？>

然后在分頁方法中添加$ page參數。 根據您當前的參數確定是否使用“＆”可能有些棘手。

2. 您可以在分頁方法中添加新參數以標識當前的url參數。 然后，您可以使用它們來生成用於分頁的完整URL。

   函數分頁（$ query，$ per_page = 10，$ page = 1，$ url ='？'，$ parameters = array（））{}

並在調用該方法時將當前的url參數（$ city，$ state）作為數組傳遞。

Answer 5

你好嗎？

您必須將城市和州參數傳遞給分頁功能。

function pagination($query, $per_page = 10, $page = 1, $params = array()) {
    ...
    $params['page'] = $page; // or $counter or $nextPage, ...
    ...
    $url = http_build_query($params);
    $html = '<a href="' . $url . '">XXX</a>';
}

然后，通過$ _REQUEST調用它（如果從另一側生成參數，則調用另一個變量）；

$Admin->pagination($statement,$limit, $page, $_REQUEST);

問候。

Answer 6

undefiend index are not a programming error
if comes because you not pass any request city in url
for ignore you can use error_reporting(0);

or use

if(isset($_REQUEST['city'])){
$city=$_REQUEST['city'];
}
else{
//....
//$city="default value";
}

if(isset($_REQUEST['state'])){
$state=$_REQUEST['state'];
}
else{
//default operation
}