從mysql_num_rows中選擇查詢

Question

我想創建多個搜索，其中聲明$ where_search是來自帖子表單的多個條件。 但當我使用此代碼“.where_search”時，stil錯誤。 在mysql_num_rows用於分頁的條件

$tampil2 = mysql_query("SELECT * FROM bb where ".$where_search."  and kd_kelompok='2' and kd_komoditi='11' and nm_sebutan IS NOT NULL " );

這是完整的代碼。

$where_search = "kd_pok='2' and kd_komoditi='11' ";

if (isset($_POST['lakpus']))
{

    if (empty($_POST['lakpus']))
    {

    }
    else
    {

        if (empty($where_search))
        {
             $where_search .= "lakpus = '$lakpus' ";
        }
        else
        {

             $where_search .= "AND lakpus = '$lakpus' ";

        }
    }
} 

if (isset($_POST['kd_por']))
{
    $kd_por = $_POST['kd_por'] ;

    if (empty($_POST['kd_por']))
    {

    }
    else
    {

        if (empty($where_search))
        {
            $where_search .= "kd_por = '$kd_por' ";

        } 
        else
        {

            $where_search .= "AND tab1.kd_por = '$kd_por' ";

        }
    }
} 

$max=15;
$tampil2 = mysql_query("SELECT * FROM bb where ".$where_search."  and kd_kelompok='2' and kd_komoditi='11' and nm_sebutan IS NOT NULL " );
$jml = mysql_num_rows($tampil2);
$jmlhal  = ceil($jml/$max);

Answer 1

也許你的錯誤在這里：

$where_search .= "AND tab1.kd_por = '$kd_por' ";

因為你沒有聲明“tab1”。 嘗試更改為：

$where_search .= "AND kd_por = '$kd_por' ";

編輯1

你沒有從$_POST恢復var $lakpus befofe使用它。 以下是您必須更新的代碼的一部分。

...

else
{

    $lakpus = $_POST['lakpus'];

    if (empty($where_search))
    {
        $where_search .= "lakpus = '$lakpus' ";
    }

    ...

編輯2

正如我在評論中所說，嘗試在mysql_query（）之后調用mysql_num_rows（），如下所示。

$qry = "SELECT * FROM bb where ".$where_search; 

$res = mysql_query($qry); 

$num = mysql_num_rows($res);

$row = mysql_fetch_array($res);