javascript - 在 Javascript 警告框中的新行中显示 PHP 数组的每个条目

Question

我有一个简单的查询来从数据库中选择一些信息:

  $dep_qry = "select product_name, sum(theoretical_stock_level) as opening_stock, sum(quantity_scanned) as closing_stock, department_description, stock_item_code, custom_1 AS size, IFNULL(unit_cost_price, 0.00) AS cost_price from stocktake_products where stocktake_id = '{$stocktake_id}' AND is_deli = 0 
                         group by product_name, department_description
                         order by department_description ASC;";

    $dep_res = db::c()->query($dep_qry);

然后我使用以下代码将成本价为 0.00 的产品放入数组中。然后我检查数组中元素的数量。如果数组中有一些信息，我想向用户显示一个警报，告诉他哪些项目的成本价为 0。下面的代码有效，但我想知道是否可以显示数组中的每个条目警告框中的单独一行？只是为了使它更加用户友好。

while ($row1 = $dep_res->fetch(PDO::FETCH_ASSOC))
    {
        $cost_price = number_format($row1['cost_price'],2);
        $pname = $row1['product_name'];
        if ($cost_price == 0.00)
        {
            $products[$i] = $pname;
        }
        $i++;
    }

    $numOfNoCosts = count($products);
    if ($numOfNoCosts > 0)
    {
        echo "<script> alert('".json_encode($products)."') </script>";
    }

如果有更好的方法，我很乐意接受建议!

Answer 1

Try this to show like array values on each line

alert(arrayname.join("\n"));

Try this to show like an array:

alert(JSON.stringify(your_array));

首先用php数组值准备好一个js变量。像这样

<script type="text/javascript">
    var obj = <?php echo json_encode($Your_array); ?>;
</script>

A full Tried and tested example below

<?php $phpArray = array(
          0 => "Mon", 
          1 => "Tue",  
          2 => "Wed", 
          3 => "Thu",
          4 => "Fri", 
          5 => "Sat",
          6 => "Sun",

    )
?>


<script type="text/javascript">

    var jArray= <?php echo json_encode($phpArray ); ?>;

   alert(jArray.join("\n"));

 </script>