从具有多个值 php 的数组中过滤

Question

 $tick = file_get_contents('https://api.coinmarketcap.com/v2/ticker');
 $data = json_decode($tick, TRUE);
 var_dump($data);

按此代码过滤时 $data 的结果：

if($key == 1027)
$me=$value;

array (size=10)


'id' => int 1
  'name' => string 'Bitcoin' (length=7)
  'symbol' => string 'BTC' (length=3)
  'website_slug' => string 'bitcoin' (length=7)
  'rank' => int 1
  'circulating_supply' => float 17271050
  'total_supply' => float 17271050
  'max_supply' => float 21000000
  'quotes' => 
    array (size=1)
      'USD' => 
        array (size=6)
          'price' => float 6501.77307056
          'volume_24h' => float 3202089755.7065
          'market_cap' => float 112292447790
          'percent_change_1h' => float 0.14
          'percent_change_24h' => float -0.67
          'percent_change_7d' => float 1.37
  'last_updated' => int 1537115604

我需要这个结果的数据是为了插入数据库

name' => string 'Ethereum' (length=8)
'symbol' => string 'ETH' (length=3)
'circulating_supply' => float 101996833
  'total_supply' => float 101996833
  'max_supply' => null
  'quotes' => 
    array (size=1)
      'USD' => 
        array (size=6)
          'price' => float 218.486594482
          'volume_24h' => float 1511169511.1798
          'market_cap' => float 22284940724
          'percent_change_1h' => float 0.7
          'percent_change_24h' => float -2.81
          'percent_change_7d' => float 8.08
  'last_updated' => int 1537116039

现在请运行这个代码

$tick = file_get_contents('https://api.coinmarketcap.com/v2/ticker');
 $data = json_decode($tick, TRUE);
 var_dump($data);

这个阵列中有超过 100 个数字硬币我不再需要 3 个 thia 阵列硬币 BTC、ETH、莱特币过滤这个的最佳方法是什么!!!

Answer 1

现在问题清楚多了

您可以使用 array_filter 来获得它。

考虑以下代码：

$tick = file_get_contents('https://api.coinmarketcap.com/v2/ticker');
$data = json_decode($tick, TRUE);

$symbols = array("BTC", "ETH", "LTC");
$filtered = array_filter($data['data'], function($elm) use ($symbols){
    return (in_array($elm['symbol'], $symbols));
});
echo print_r($filtered, true);

我按符号过滤，但您可以通过将 (in_array($elm['symbol'], $symbols)) 更改为其他字段然后 symbol

来更改过滤字段

从具有多个值 php 的数组中过滤

filter from array with multiple value php

php

arraylist

array-map

array-filter

array-difference