PDO綁定PARAMS循環

Question

當重複如果我運行下面的代碼：

$query = "select * from city where region = :region and country = :country"; 
    $stmt = db->prepare($query); 
    $region = '06'; 
    $country = 'ad'; 
    $params = array(":region" => $region, ":country" => $country); 
    foreach ($params as $key => $value) { 
     $stmt->bindParam($key, $value, PDO::PARAM_STR); 
    } 
    $stmt->execute(); 
    return $stmt->fetchAll(); 

我在查詢日誌中看到的是：

select * from city where region = 'ad' and country = 'ad' 

這是爲什麼？ 需要注意的是，如果我只是參數綁定了一個又一個喜歡在這裏不會發生：

$stmt->bindParam(':region', $region, PDO::PARAM_STR); 
$stmt->bindParam(':country', $country, PDO::PARAM_STR); 

Answer 1

在你最終覆蓋綁定，而不是添加到它的foreach()聲明。既然你有陣列，你可以執行：

$query = "select * from city where region = :region and country = :country"; 
$stmt = db->prepare($query); 
$region = '06'; 
$country = 'ad'; 
$params = array(":region" => $region, ":country" => $country); 
$stmt->execute($params); // put the array here 
return $stmt->fetchAll();