PHP查询数组某值

Question

如查询BTC时.把里面的BTC各数据取出来.查询ETH时.就把里面ETH里各数据取现来..
{
"data":{
"1":{
"id":1,
"name":"Bitcoin",
"symbol":"BTC",
"website_slug":"bitcoin",
"rank":1,
"circulating_supply":17040312.0,
"total_supply":17040312.0,
"max_supply":21000000.0,
"quotes":{
"USD":{
"price":8141.89,
"volume_24h":5978330000.0,
"market_cap":138740345870.0,
"percent_change_1h":0.14,
"percent_change_24h":-1.98,
"percent_change_7d":-7.2
}
},
"last_updated":1526636671
},
"1027":{
"id":1027,
"name":"Ethereum",
"symbol":"ETH",
"website_slug":"ethereum",
"rank":2,
"circulating_supply":99509087.0,
"total_supply":99509087.0,
"max_supply":null,
"quotes":{
"USD":{
"price":683.134,
"volume_24h":2455830000.0,
"market_cap":67978040574.0,
"percent_change_1h":0.22,
"percent_change_24h":-2.81,
"percent_change_7d":-2.68
}
},
"last_updated":1526636958
},
"52":{
"id":52,
"name":"Ripple",
"symbol":"XRP",
"website_slug":"ripple",
"rank":3,
"circulating_supply":39189968239.0,
"total_supply":99992233977.0,
"max_supply":100000000000.0,
"quotes":{
"USD":{
"price":0.674545,
"volume_24h":353429000.0,
"market_cap":26435397126.0,
"percent_change_1h":0.14,
"percent_change_24h":-3.24,
"percent_change_7d":-4.18
}
},
"last_updated":1526636941
},
"1975":{
"id":1975,
"name":"ChainLink",
"symbol":"LINK",
"website_slug":"chainlink",
"rank":100,
"circulating_supply":350000000.0,
"total_supply":1000000000.0,
"max_supply":null,
"quotes":{
"USD":{
"price":0.450519,
"volume_24h":1371140.0,
"market_cap":157681650.0,
"percent_change_1h":0.15,
"percent_change_24h":-6.09,
"percent_change_7d":-9.53
}
},
"last_updated":1526636956
}
},
"metadata":{
"timestamp":1526636754,
"num_cryptocurrencies":1593,
"error":null
}
}

Answer 1

$arr=$arr['data'];$arr1=array_filter($arr,function($item){return$item['symbol']=='BTC';});var_dump($arr1);

Answer 2

functiongetData($type){$data=obj["data"];foreach($dataas$item){if($item['symbol']==$type){return$item;}}}$btcData=getData("BTC");