Question

我有这些foreach循环的问题，如果我嵌套它们输出不正确..在下面的代码中：事物将被多次添加到数据库..所以我实际上需要一个带有2个条件的foreach循环但是我不知道这是否可能？我需要将产品和数量添加到数据库中。

$keys = array_keys($_SESSION['meal1']);

    foreach ($_SESSION['meal1'] as $quantity)   { 

        foreach ($keys as $products) {                     

 $query1 = sprintf("INSERT INTO `maaltijdproducten`(`meal_id`, `product_id`, `quantity`, `schema_id`) VALUES ('1' ,'$products', '$quantity', '$schemaid')");
                $result1 = mysql_query($query1);
            }
        }

会话＆＃39;饭1＆＃39;就像：产品是指数，数量是价值：

array (size=2)
  1 => int 1
  7 => int 6

Answer 1

如果数组相同，则不需要迭代两次。

$keys = array_keys($_SESSION['meal1']);  //it contains the keys in an an array

foreach ($_SESSION['meal1'] as $quantity)   {  //it iterates the array and the value of each key is in $quantity.

我想你可能需要

foreach ($_SESSION['meal1'] as $current_key => $quantity)   {
//$current_key -> product as you mentioned

Answer 2

这可能就是你要找的东西：

$meals = $_SESSION['meal1'];    

foreach($meals as $quantity => $product) {
    $query1 = sprintf("INSERT INTO `maaltijdproducten`(`meal_id`, `product_id`, `quantity`, `schema_id`) VALUES ('1' ,'$product', '$quantity', '$schemaid')");
            $result1 = mysql_query($query1);
}

PHP - foreach循环多个条件？

2 个答案: