从mysql_query结果过滤数组值

Question

所以...我是PHP dummie，我试图过滤一个数组。

我有以下PHP函数从MySQL

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function hook_plan1($vars){ 
    $result = mysql_query("SELECT * FROM tblpricing WHERE relid=12 AND type='product'"); 
    $products = array(); 
    while($data = mysql_fetch_assoc($result)){ 
    array_push($products, $data); 
    } 
    return array(
    "plan1" => $products); 
} 

该函数呈现以下的数组：

->plan1 = Array (7) 
    0 => Array (16) 
    id => "71" 
    type => "product" 
    currency => "1" 
    ... 
    1 => Array (16) 
    id => "80" 
    type => "product" 
    currency => "3" 
    ... 
    2 => Array (16) 
    id => "402" 
    type => "product" 
    currency => "14" 
    ... 

我想过滤的“货币”该阵列（其配在$ _SESSION），所以我可以得到一个单一的数组，如下所示：

->plan1 = Array (16) 
    id => "402" 
    type => "product" 
    currency => "14" 
    ... 

我敢肯定它是容易的，所以我尝试以下滤镜阵列：

function hook_plan1($vars){ 
    $currency_id = $_SESSION['currency'];//this is a number 
    $result = mysql_query("SELECT * FROM tblpricing WHERE relid=12 AND type='product'"); 
    while ($data = mysql_fetch_assoc($result)) { 
    $products = $data; 
    } 
    $filter = (is_array($products) && $products['currency'] == $currency_id); 
    $filtered_product = (array_filter($products, $filter)); 
    return array(
    "plan1" => $filtered_product); 
} 

但它不工作:( 任何想法？

Answer 1

正如评论说，如果你在MySQL查询过滤器这个是好了很多：

$currency_id = (int)$_SESSION['currency'];//you should be REALLY sure this is a number 
$result = mysql_query("SELECT * FROM tblpricing WHERE relid=12 AND type='product' AND currency=$currency_id"); 

但如果由于某种原因，你绝对，绝对，肯定需要在PHP端对其进行过滤，然后你需要交付[在此插入盗喇叭]返回函数的函数，换句话说，你$filter变量应该是：

$filter = function($currencyToFilter) { 
     return function($arrayRow) use ($currencyToFilter) { 
      return $arrayRow['type'] === $currencyToFilter; 
     }; 
    }; 

这是一个Closure thingy。然后调用（我使用的$products代替$data通知）：

$filtered_product = array_filter($products, $filter($_SESSION['currency']));