php 把商品sku的数组 整理了一下，方便输出

cyw0413

如把一个数组：

[PHP] 纯文本查看 复制代码

$original => [ 
  0 => array:4 [
    "attr_id" => 1
    "value_id" => 1
    "attr_name" => "颜色"
    "value" => "白色"
  ]
  1 => array:4 [
    "attr_id" => 2
    "value_id" => 4
    "attr_name" => "内存"
    "value" => "128G"
  ]
  2 => array:4 [
    "attr_id" => 3
    "value_id" => 7
    "attr_name" => "版本"
    "value" => "港版"
  ]
  3 => array:4 [
    "attr_id" => 1
    "value_id" => 2
    "attr_name" => "颜色"
    "value" => "红色"
  ]
  4 => array:4 [
    "attr_id" => 2
    "value_id" => 4
    "attr_name" => "内存"
    "value" => "128G"
  ]
  5 => array:4 [
    "attr_id" => 3
    "value_id" => 7
    "attr_name" => "版本"
    "value" => "港版"
  ]
]

整理成这样的数组：

[PHP] 纯文本查看 复制代码

$originalArray = [
	0=>[
		"attr_name" => "颜色" 
		"value" => ["红色","白色"]
	]
	
	1=>[
		"attr_name" => "内存" 
		"value" => ["128G"]
	]
]; 

且过滤到重复的value


可以使用array_reduce函数来对数组进行整理和去重，示例代码如下：

[PHP] 纯文本查看 复制代码

$original = [ 
    0 => [
        "attr_id" => 1,
        "value_id" => 1,
        "attr_name" => "颜色",
        "value" => "白色",
    ],
    1 => [
        "attr_id" => 2,
        "value_id" => 4,
        "attr_name" => "内存",
        "value" => "128G",
    ],
    2 => [
        "attr_id" => 3,
        "value_id" => 7,
        "attr_name" => "版本",
        "value" => "港版",
    ],
    3 => [
        "attr_id" => 1,
        "value_id" => 2,
        "attr_name" => "颜色",
        "value" => "红色",
    ],
    4 => [
        "attr_id" => 2,
        "value_id" => 4,
        "attr_name" => "内存",
        "value" => "128G",
    ],
    5 => [
        "attr_id" => 3,
        "value_id" => 7,
        "attr_name" => "版本",
        "value" => "港版",
    ],
];

$originalArray = array_reduce($original, function ($carry, $item) {
    $attrName = $item['attr_name'];
    if (!isset($carry[$attrName])) {
        $carry[$attrName] = [
            'attr_name' => $attrName,
            'value' => [],
        ];
    }
    if (!in_array($item['value'], $carry[$attrName]['value'])) {
        $carry[$attrName]['value'][] = $item['value'];
    }
    return $carry;
}, []);

$originalArray = array_values($originalArray);

解释一下代码：首先使用array_reduce函数对原始数组进行遍历，将每个属性和属性值整理到新数组中。对于新数组中的每个属性，使用isset函数判断其是否已经存在，如果不存在则初始化为一个包含attr_name和value两个键的数组。接着，如果当前属性值不存在于新数组中的该属性的value数组中，则将其添加到value数组中。最后，返回整理后的新数组。最后使用array_values函数将新数组中的键重置为0到n-1的连续整数，以便后续的操作。

wan456

isset函数能判断多少个

zhangjjjqing

这个问题一直没搞懂

starsw001

看看程序的执行效率高不高了。