Question

我正在对订单总数进行OpenCart修改。这是代码的片段：

<?php
foreach ($data['totals'] as $total) {
    if (
        $this->db->escape($total['code'])=="sub_total" ||
        $this->db->escape($total['title'])="Sub-Total" 
    ) {
        $this->db->query("INSERT INTO " . DB_PREFIX . "order_total SET order_id = '" . (int)$order_id . "', code = '" . $this->db->escape($total['code']) . "', title = '" . $this->db->escape($total['title']) . "', text = '" . $this->db->escape($total['text']) . "', `value` = '" . (float)$data['total'] . "', sort_order = '" . (int)$total['sort_order'] . "'");
    } else {
        $this->db->query("INSERT INTO " . DB_PREFIX . "order_total SET order_id = '" . (int)$order_id . "', code = '" . $this->db->escape($total['code']) . "', title = '" . $this->db->escape($total['title']) . "', text = '" . $this->db->escape($total['text']) . "', `value` = '" . $_SESSION['GCFinalOrderTotalIncludingDelivery'] . "', sort_order = '" . (int)$total['sort_order'] . "'");
    }
}
?>

这是伪代码。 IF / Else可以嵌套在foreach语句中吗？

<?php
foreach ($d['totals'] as $total) {
    if ($query=="x" ||  $query=="y") {
        a();
    } else {
        b();
    }
}
?>

Answer 1

当然可以。

很难用30个字符来表达。

Answer 2

当然可以。不清楚你的问题是什么，但假设你在这一行中有一个错字：

$this->db->escape($total['title']) = "Sub-Total"

应该是这样的：

$this->db->escape($total['title']) == "Sub-Total"

Answer 3

是的，你可以这样做。这是非常常见的。确保在测试时使用==;你有=作为考试。

Answer 4

我想你现在知道：“是的，他们可以！”。但是：如果你的循环不是那么大，你可能想重新考虑两个分支之间的实际差异。以你的伪代码为例：如果根据一个不是从循环本身提供的变量派生的值决定分支，你最好移动分支：

foreach($someArr as $k=>$v)
{
    if ($someOtherVar === true)
    {
        echo 'The value is '.$v;
    }
    else
    {
        echo 'The key is '.$k;
    }
}

可以（并且应该）写成：

$str = 'The '.($someOtherVar === true ? 'value' : 'key').' is ';
foreach($someArr as $k=>$v)
{
    echo $str.$v;
}

Answer 5

是绝对的。请注意使用编程语言会有什么意义。

Answer 6

在OpenCart中，您尝试编辑的文件我假设是订单模型吗？

<强> /catalog/model/checkout/order.php

FAngel提到错过了两个==，但是问题出在你的浮动上。数据属性在此函数中被删除。因为数据数组不再位于该代码段内。它依赖于TOTAL：

所以你的行：

$this->db->query("INSERT INTO " . DB_PREFIX . "order_total SET order_id = '" . (int)$order_id . "', code = '" . $this->db->escape($total['code']) . "', title = '" . $this->db->escape($total['title']) . "', text = '" . $this->db->escape($total['text']) . "', `value` = '" . (float)$data['total'] . "', sort_order = '" . (int)$total['sort_order'] . "'");

应该是:(注意新的(float)$total['value']）

$this->db->query("INSERT INTO " . DB_PREFIX . "order_total SET order_id = '" . (int)$order_id . "', code = '" . $this->db->escape($total['code']) . "', title = '" . $this->db->escape($total['title']) . "', text = '" . $this->db->escape($total['text']) . "', `value` = '" . (float)$total['value'] . "', sort_order = '" . (int)$total['sort_order'] . "'");

这意味着：

#######
// WAS (float)$data['value'] 
// NOW (float)$total['value']
#######
foreach ($data['totals'] as $total) {
    if (
    $this->db->escape($total['code'])=="sub_total" ||
    $this->db->escape($total['title'])=="Sub-Total" 
    ) {
        $this->db->query("INSERT INTO " . DB_PREFIX . "order_total SET order_id = '" . (int)$order_id . "', code = '" . $this->db->escape($total['code']) . "', title = '" . $this->db->escape($total['title']) . "', text = '" . $this->db->escape($total['text']) . "', `value` = '" . (float)$total['value'] . "', sort_order = '" . (int)$total['sort_order'] . "'");
    } else {
        $this->db->query("INSERT INTO " . DB_PREFIX . "order_total SET order_id = '" . (int)$order_id . "', code = '" . $this->db->escape($total['code']) . "', title = '" . $this->db->escape($total['title']) . "', text = '" . $this->db->escape($total['text']) . "', `value` = '" . $_SESSION['GCFinalOrderTotalIncludingDelivery'] . "', sort_order = '" . (int)$total['sort_order'] . "'");
    }
}

PHP foreach语句可以在其中包含if / else吗？

6 个答案: