Question

设置可以有多个可选过滤器的搜索。

$sql = "SELECT *
        FROM table 
        WHERE title = :title 
        AND filter1 = :filter1 
        AND filter2 = :filter2 
        AND filter3 = :filter3";
$query = $dbc->prepare($sql);
$query->execute(
           array(
             ':title' => $title, 
             ':filter1' => $filter1,
             ':filter2' => $filter2, 
             ':filter3' => $filter3
           )
        );

此问题有时过滤器变量将为空。如果过滤器为空，那么任何值都应该起作用。我已经尝试将空过滤器设置为通配符（％），但这似乎不起作用。

if(empty($filter1)) $filter1 = '%';

Answer 1

您需要有条件地将它们添加到SQL和execute（）中的SQLDATA。

$filters = array(
  ':filter1': $filter1, 
  ':filter2': $filter2, 
  ':filter3': $filter3
);
$sql = "SELECT * FROM TABLE WHERE title = :title";
$sqldata = array(
  ':title' => $title
);
foreach ($filters as $key => $value) {
  $sql .= " AND $key=$value";
  $sqldata[$key] => $value;
}
$query = $dbc->prepare($sql);
$query->execute($sqldata);

pdo预备变量列表的语句

1 个答案: