合并 PHP 中多个数组的值

Question

我有以下对象：

"themes": [
    {
      "name": "Anchor",
      "categories": "Creative, Portfolio",
    },
    {
      "name": "Agensy",
      "categories": "Creative, Portfolio",
    },
    {
      "name": "Serenity Pro",
      "categories": "One-Page, Multipurpose, Business, Landing Page",
    },
    {
      "name": "Integral Pro",
      "categories": "One-Page, Multipurpose, Business, Landing Page",
    }
  ]

我想遍历每个数组并收集类别键的值

然后删除重复项并吐出一组唯一的类别名称。

我有以下代码：

$json = $this->curl_get_marketplace_contents();
$array = json_decode($json, true);
$categories = array();
foreach ($array['themes'] as $theme) {
    $array = explode(",", $theme['categories']);
    $array = array_map('trim', $array);
    $array = array_values($array);
    $array = array_unique($array);
    $categories = array_push($array, $categories);
    
};
return $categories;

但它不起作用。它 returns 是空的。

我觉得我很接近，但我犯了一个菜鸟错误。如果有人能指出我正确的方向，那就太好了。

Answer 1

使用array_merge()组合数组，而不是array_push()。

合并所有内容后删除最后的重复项。

$json = $this->curl_get_marketplace_contents();
$data = json_decode($json, true);
$categories = array();
foreach ($data['themes'] as $theme) {
    $array = explode(",", $theme['categories']);
    $array = array_map('trim', $array);
    $categories = array_merge($array, $categories);
    
};
return array_unique($categories);

合并 PHP 中多个数组的值

Merge values from multiple arrays in PHP

php

arrays

foreach