Question

如何通过传入ID更改数组中的字段值

例如，read_excel是$ cityID = '2';，对于特维尔市，应将UF_DEFAULT更改为，对于莫斯科市，应将$ cityID = '10' ;更改为0

或不存在UF_DEFAULT，请保留所有内容而不覆盖$cityID = '2'; // 2 - есть | 10 - нет $arr = array( '1'=>array('ID'=>'1', 'NAME'=>'Moscow', 'UF_DEFAULT'=>'1', 'UF_CITY_CORD'=>'55.76, 37.64'), '2'=>array('ID'=>'2', 'NAME'=>'Tver', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'), '3'=>array('ID'=>'3', 'NAME'=>'Nahodka', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'), '4'=>array('ID'=>'4', 'NAME'=>'Omsk', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'), ); foreach($arr as $key => $arSection) { $arSectionsResult[$arSection['ID']] = $arSection; } unset($key, $arSection); echo "<pre>";print_r($arSectionsResult);echo "</pre>";

* Adds Author, World and Series information to the shop loop above the “Add to cart” button
**/

add_action( 'woocommerce_after_shop_loop_item', 'shop_display_author_and_world',9);

function shop_display_author_and_world() {

global $product;

// Find custom fields
    $authorname = get_post_meta( get_the_ID(), 'product_author_name.post_title', true );
    $authorurl = get_post_meta( get_the_ID(), 'product_author_name.permalink', true );
    $world = get_post_meta( get_the_ID(), 'product_world.post_title', true );
    $worldurl = get_post_meta( get_the_ID(), 'product_world.permalink', true );
    $series = get_post_meta( get_the_ID(), 'product_series', true );
    $seriesnum = get_post_meta( get_the_ID(), 'product_series_number', true );

// Add these fields to the shop loop if set

if ( ! empty ( $series ) ) {

    echo '<div><a style="color:#54595F;font-weight:bold" href="'. $authorurl .'">'. $authorname . '</a><br><a style="color:#E12021;" href="'. $worldurl .'">'. $world . '</a><br><span style="color:#54595F; font-variant:small-caps">'. $series . ', book ' . $seriesnum .'</span></div>';
}
else {

    echo '<div><a style="color:#54595F;font-weight:bold" href="'. $authorurl .'">'. $authorname . '</a><br><a style="color:#E12021;" href="'. $worldurl .'">'. $world . '</a></div>' ;

}}

无论如何都要感谢

Answer 1

$cityID = '10'; // 2 - есть | 10 - нет
$arr = array(
    '1'=>array('ID'=>'1', 'NAME'=>'Moscow', 'UF_DEFAULT'=>'1', 'UF_CITY_CORD'=>'55.76, 37.64'),
    '2'=>array('ID'=>'2', 'NAME'=>'Tver', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'),
    '3'=>array('ID'=>'3', 'NAME'=>'Nahodka', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'),
    '4'=>array('ID'=>'4', 'NAME'=>'Omsk', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'),
);

// first we find - if we should change UF_DEFAULT
$changeDefault = false;
foreach ($arr as $item) {
    // find item with same ID and UF_DEFAULT != 1
    if ($item['ID'] === $cityID && $item['UF_DEFAULT'] != 1) {
        $changeDefault = true;
        break;
    }
}

// if you have to `changeDefault` - iterate over 
// array again and change according to `cityID`
if ($changeDefault) {
    foreach ($arr as &$item) {
        $item['UF_DEFAULT'] = $item['ID'] == $cityID ? 1 : 0;
    }
}

print_r($arr);

Answer 2

即使我不太了解问题背后的逻辑，这也是实现此目的的一种方法。

首先检查给定密钥是否存在array_key_exists。如果是这样，请将除给定ID之外的所有UF_DEFAULT设置为0。

if (array_key_exists($cityId, $arr)) {
    foreach ($arr as $k => $city) {
        $arr[$k]["UF_DEFAULT"] = 0;
    }
    $arr[$cityId]["UF_DEFAULT"] = 1;
} else {
    // Key not existent...
}

Answer 3

仅执行一次循环。仅更改需要更改的值。尽快退出迭代。

我正在循环中“通过引用修改输入数组”。为避免使用$row发布问题下标，我在循环结束时将其取消设置。

代码：（Demo）

$cityID = '2';
$oldCityFound = false;
$newCityFound = false;
$arr = [
        '1' => ['ID'=>'1', 'NAME'=>'Moscow', 'UF_DEFAULT'=>'1', 'UF_CITY_CORD'=>'55.76, 37.64'],
        '2' => ['ID'=>'2', 'NAME'=>'Tver', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'],
        '3' => ['ID'=>'3', 'NAME'=>'Nahodka', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'],
        '4' => ['ID'=>'4', 'NAME'=>'Omsk', 'UF_DEFAULT'=>'0', 'UF_CITY_CORD'=>'55.76, 37.64'],
];
foreach ($arr as &$row) {
    if ($row['ID'] == $cityID) {
        if ($row['UF_DEFAULT'] == 1) {
            break; // nothing to change
        }
        $row['UF_DEFAULT'] = 1;
        $newCityFound = true;
    } elseif ($row['UF_DEFAULT'] == 1) {
        $row['UF_DEFAULT'] = 0;
        $oldCityFound = true;
    }
    if ($newCityFound && $oldCityFound) {
        break; // both jobs done ...efficiently
    }
}
unset($row); // best practice
var_export($arr);

在我的回答中，我假设不信任外键作为ID值。如果外键始终等于其中的ID值，则可以在循环之前执行两个快捷键：

if (!isset($arr[$cityID])) {
    // cityID not found, now what?
}

和

if ($arr[$cityID]['UF_DEFAULT']  == 1) {
    // nothing to change 
}

如何通过传入ID更改数组中的字段值

3 个答案: