循环在php中创建选项数据答案

【问题标题】：Loop to create option data in php循环在php中创建选项数据
【发布时间】：2018-01-11 03:37:30
【问题描述】：

数据

    Array
        (
            [0] => Array
                (
                    [name] => USPS First Class Package (2 To 3 business days)
                    [value] => USPSFirstClass
                    [category] => STANDARD
                )

            [1] => Array
                (
                    [name] => USPS Priority Mail (1 To 3 business days)
                    [value] => USPSPriority
                    [category] => EXPEDITED
                )

            [2] => Array
                (
                   [name] => FedEx Ground or FedEx Home Delivery (1 To 5 
 business days)
                   [value] => FedExHomeDelivery
                   [category] => STANDARD
        )

            [3] => Array
              (
                  [name] => UPS Ground (1 To 5 business days)
                  [value] => UPSGround
                  [category] => EXPEDITED
              )

        )

问题：我想将上面的数据循环为带有 optgroup 标签的下拉列表。下拉数据将显示为

标准

USPS 头等舱包裹（2 到 3 个工作日）

FedEx Ground 或 FedEx Home Delivery（1 至 5 工作日）

加急

USPS 优先邮件（1 到 3 个工作日）

UPS 陆运（1 到 5 个工作日）

我该怎么做:(

【问题讨论】：

到目前为止你尝试过什么？
投反对票，因为没有编码尝试。投票结束，因为太宽泛了。
一个快速的谷歌会给你一些灵感。如stackoverflow.com/questions/21876224/…和stackoverflow.com/questions/40787238/…和stackoverflow.com/questions/7215937/…

标签： php

【解决方案1】：

您可以执行以下操作：

<?php

$data = array(
    array(
        'name' => 'USPS First Class Package (2 To 3 business days)',
        'value' => 'USPSFirstClass',
        'category' => 'STANDARD'
    ),
    array(
        'name' => 'USPS Priority Mail (1 To 3 business days)',
        'value' => 'USPSPriority',
        'category' => 'EXPEDITED'
    ),
    array(
        'name' => 'FedEx Ground or FedEx Home Delivery (1 To 5 business days)',
        'value' => 'FedExHomeDelivery',
        'category' => 'STANDARD'
    ),
    array(
        'name' => 'UPS Ground (1 To 5 business days)',
        'value' => 'UPSGround',
        'category' => 'EXPEDITED'
    ),
);

将您的类别分类到一个数组中：

$sorted = array();
foreach ($data as $key => $value){
    $sorted[$value['category']][] = array($value['name'], $value['value']);
}

并循环遍历它：

echo "<select>";
foreach ($sorted as $key => $value){
    echo "<optgroup label='$key'>";
    foreach ($value as $v){
        echo "<option value='". $v[1]."'>". $v[0] ."</option>";
    }
    echo "</optgroup>";
}
echo "</select>";

?>

【讨论】：

【解决方案2】：

类似的东西

<?php
$data = [
    [
        'name' => 'USPS First Class Package (2 To 3 business days)',
        'value' => 'USPSFirstClass',
        'category' => 'STANDARD'
    ],
    [
        'name' => 'USPS Priority Mail (1 To 3 business days)',
        'value' => 'USPSPriority',
        'category' => 'EXPEDITED'
    ],
    [
        'name' => 'FedEx Ground or FedEx Home Delivery (1 To 5
 business days)',
        'value' => 'FedExHomeDelivery',
        'category' => 'STANDARD'
    ],
    [
        'name' => 'UPS Ground (1 To 5 business days)',
        'value' => 'UPSGround',
        'category' => 'EXPEDITED'
    ]
];

function _group_by($array, $key)
{
    $return = array();
    foreach ($array as $val) {
        $return[$val[$key]][] = $val;
    }

    return $return;
}

$result = _group_by($data, 'category');
?>

<select>
    <?php foreach ($result as $key => $value): ?>
        <optgroup label="<?php echo $key ?>">
            <?php foreach ($value as $v): ?>
                <option value="<?php echo $v['value'] ?>"><?php echo $v['name'] ?></option>
            <?php endforeach; ?>
        </optgroup>
    <?php endforeach; ?>
</select>

这个_group_by 函数根据你的键分离你的数组

【讨论】：

【解决方案3】：

你也可以试试这个：

1)为标准值和加急值创建数组

$standard=array();
$expedited=array();

2)遍历你的数组

foreach($array_1 as $k=>$v) {
    if($v['category'] == 'STANDARD'){
        array_push($standard,$v['name']);
    }
    if($v['category'] == 'EXPEDITED'){
        array_push($expedited,$v['name']);
    }
}

3)打印你需要的东西

print("STANDARD");
print nl2br("\n");
foreach($standard as $s){
    print_r($s);
    print nl2br("\n");
}

print nl2br("\n");
print("EXPEDITED");
print nl2br("\n");
foreach($expedited as $e){
    print($e);
    print nl2br("\n");
}

最终输出将是：

STANDARD
USPS First Class Package (2 To 3 business days)
FedEx Ground or FedEx Home Delivery (1 To 5 )

EXPEDITED
USPS Priority Mail (1 To 3 business days)
UPS Ground (1 To 5 business days)

【讨论】：

【解决方案4】：

您可以使用array_multisort函数按类别对其进行排序

然后循环。

【讨论】：