Question

我是PHP的新手。

我需要为API目的发送数据。

我有像这样的数组print_r($detail)

Array
(
    [0] => Array
        (
            [id] => item1
        )
    [1] => Array
        (
            [price] => 300
        )
    [2] => Array
        (
            [quantity] => 1
        )
    [3] => Array
        (
            [id] => item2
        )
    [4] => Array
        (
            [price] => 400
        )
    [5] => Array
        (
            [quantity] => 2
        )
)

我希望在发送到另一个进程之前将其转换为多维，例如

Array
(
    [0] => Array
        (
            [id] => item1
            [price] => 300
            [quantity] => 1
        )
    [1] => Array
        (
            [id] => item2
            [price] => 400
            [quantity] => 2
        )
)

怎么可能？

Answer 1

您可以将$details阵列拆分为多个块。我编写了以下接受自定义块大小的函数（注意count($initialArray) % $chunkSize === 0必须为true）：

function transformArray(array $initialArray, $chunkSize = 3) {
    if (count($initialArray) % $chunkSize != 0) {
        throw new \Exception('The length of $initialArray must be divisible by ' . $chunkSize);
    }

    $chunks = array_chunk($initialArray, 3);
    $result = [];

    foreach ($chunks as $chunk) {
        $newItem = [];

        foreach ($chunk as $item) {
            $newItem[array_keys($item)[0]] = reset($item);
        }

        $result[] = $newItem;
    }

    return $result;
}

根据您的详细信息数组，调用transformArray($details)将导致：

可自定义的块大小允许您向源阵列添加更多数据：

$details = [
    ['id' => 'item1'],
    ['price' => 300],
    ['quantity' => 1],
    ['anotherProp' => 'some value'],
    ['id' => 'item2'],
    ['price' => 400],
    ['quantity' => 2],
    ['anotherProp' => 'another value'],
];

函数调用现在是transformArray($details, 4);：

Answer 2

此版本可能与@PHPglue答案的结果相同。但这只需要一个foreach。我认为这是Top SO用户之一所说的更快，更有效的方式。

试着看看你是否想要它。

Live Demo

<?php

function explodeArray($arr)
{
    $newArr = array();
    foreach($arr as $row)
    {
        $key = array_keys($row)[0];
        $curArr = count($newArr) > 0 ? $newArr[count($newArr)-1] : array();
        if( array_key_exists($key, $curArr) )
        {
            array_push($newArr, array($key=>$row[$key]) );
        }
        else
        {
            $index = count($newArr) > 0 ? count($newArr) - 1 : 0 ;
            $newArr[$index][$key] = $row[$key];
        }
    }
    return $newArr;
}

用于测试的不同阵列。

$detail = array(
        array('id'=>'item1'),
        array('price'=>300),
        array('quantity'=>1),
        array('id'=>'item2'),
        array('price'=>400),
        array('quantity'=>2)
    );

var_dump( explodeArray($detail) );

$detail_match = array(
        array('id'=>'item1'),
        array('price'=>300),
        array('quantity'=>1),
        array('newkey'=>'sample'),
        array('id'=>'item2'),
        array('price'=>400),
        array('quantity'=>2),
        array('newkey'=>'sample')
    );

var_dump( explodeArray($detail_match) ); // Works with any size of keys.

$detail_diff_key = array(
        array('id'=>'item1'),
        array('price'=>300),
        array('quantity'=>1),
        array('diff1'=>'sample1'),
        array('id'=>'item2'),
        array('price'=>400),
        array('quantity'=>2),
        array('diff2'=>'sample2')
    );

var_dump( explodeArray($detail_diff_key) ); // Works with any size of keys and different keys.

$detail_unmatch = array(
        array('id'=>'item1'),
        array('price'=>300),
        array('quantity'=>1),
        array('unmatchnum'=>'sample1'),
        array('id'=>'item2'),
        array('price'=>400),
        array('quantity'=>2)
    );

var_dump( explodeArray($detail_unmatch) );

Answer 3

我认为这一小段代码适合你。

使用：

$detail = array( "0" => array("id" => "item1"), "1" => array("price" => "300"), "2" => array("quantity" => "1"), "3" => array("id" => "item2"), "4" => array("price" => "400"), "5" => array("quantity" => "2"), "6" => array("id" => "item3"), "7" => array("price" => "500"), "8" => array("quantity" => "3") ); $i = 0; $j = 0; $multi_details = array(); while($j < count($detail)){ $multi_details[$i][id] = $detail[$j++][id]; $multi_details[$i][price] = $detail[$j++][price]; $multi_details[$i][quantity] = $detail[$j++][quantity]; $i++; } echo '<pre>'; print_r($multi_details); echo '</pre>';

<强>输出：

Array ( [0] => Array ( [id] => item1 [price] => 300 [quantity] => 1 ) [1] => Array ( [id] => item2 [price] => 400 [quantity] => 2 ) [2] => Array ( [id] => item3 [price] => 500 [quantity] => 3 ) )

Answer 4

这样的事情应该这样做

$newArray = array();
$newRow = array();
foreach ($array as $row) {
    $key = array_keys($row)[0];
    $value = array_values($row)[0];
    if ($key == 'id') {
        $newArray[] = $newRow;
    }
    $newRow[$key] = $value;
}
$newArray[] = $newRow;

Answer 5

此版本查找重复键，然后在它们相同时创建一个新数组，以便您可以拥有一些不同的数据。希望它有所帮助。

req.params.position;

PHP - 将单个数组转换为多维数组

5 个答案: