PHP-json_从url解码到变量

我有这个网址

 https://poloniex.com/public?command=returnTicker

这是前2个的json输出（例如）

现在我想把所有的数据都放到varialbles中。像$curreny=xxx$最后一个=xxx

我已经试过了

$url = "https://poloniex.com/public?command=returnTicker";
$response = file_get_contents($url);
$obj = json_decode($response,true);
$keys = array_keys((array)$obj);

foreach($keys as $result) {
$marketname = $result; }

这适用于第一级。 然后我得到所有货币的清单。但是如何将所有其他数据获取到货币

再来一次？像

 foreach($result[$marketname] as $result2) { }

我觉得没道理

我想要那种形式的

$currency=BTC\U BCN； $last=0.00003223； 等等

有什么想法吗？

<?php
$url = "https://poloniex.com/public?command=returnTicker";
$response = file_get_contents($url);
$obj = json_decode($response,true);
$keys = array_keys((array)$obj);
for($i=0;$i<count($keys);$i++)
{
    echo 'Currency <strong>'.$keys[$i].'</strong>, last <strong>'.$obj[$keys[$i]]['last'].'</strong><br>';
}
?>

您已经完成了获取信息的所有工作，只需要使用它：D

---

使用

print\r（$variable）

查看数组中的内容及其索引。

不需要使用数组键。
您可以使用foreach跟踪密钥

//$json = file_get_contents($url);
$json = '{"BTC_BCN":{"id":7,"last":"0.00000018","lowestAsk":"0.00000018","highestBid":"0.00000017","percentChange":"0.00000000","baseVolume":"58.73610647","quoteVolume":"328275043.97652394","isFrozen":"0","high24hr":"0.00000019","low24hr":"0.00000017"},"BTC_BELA":{"id":8,"last":"0.00001191","lowestAsk":"0.00001191","highestBid":"0.00001174","percentChange":"0.13536701","baseVolume":"6.33896473","quoteVolume":"572949.02508918","isFrozen":"0","high24hr":"0.00001200","low24hr":"0.00001033"}}';

$arr = json_decode($json, true);

Foreach($arr as $key => $val){
    Echo "in ".$key . " last is ". $val['last'] ."\n";
}

输出为：

in BTC_BCN last is 0.00000018
in BTC_BELA last is 0.00001191

---

如果要将数组中的项用作变量，可以提取变量。
我自己不使用此方法，因为值无论如何都在数组中。
我添加此方法是因为您的问题暗示这是您想要的。
在每次迭代中，变量都将被覆盖，这就是为什么不建议使用此方法的原因。
如果其中一项没有“last”，则迭代中除“last”之外的所有其他变量将被新数据覆盖。
这意味着变量中同时包含新数据和旧数据。
我的建议是使用数组，而不是提取变量

$json = '{"BTC_BCN":{"id":7,"last":"0.00000018","lowestAsk":"0.00000018","highestBid":"0.00000017","percentChange":"0.00000000","baseVolume":"58.73610647","quoteVolume":"328275043.97652394","isFrozen":"0","high24hr":"0.00000019","low24hr":"0.00000017"},"BTC_BELA":{"id":8,"last":"0.00001191","lowestAsk":"0.00001191","highestBid":"0.00001174","percentChange":"0.13536701","baseVolume":"6.33896473","quoteVolume":"572949.02508918","isFrozen":"0","high24hr":"0.00001200","low24hr":"0.00001033"}}';

$arr = json_decode($json, true);

Foreach($arr as $key => $val){
    Extract($val);
    Echo $key ."\n";
    Echo $last ."\n";
    Echo $baseVolume ."\n\n";
}

---

显示一个JSON示例。

$json = '{"BTC_BCN":{"id":7,"last":"0.00000018","lowestAsk":"0.00000018","highestBid":"0.00000017","percentChange":"0.00000000","baseVolume":"58.73610647","quoteVolume":"328275043.97652394","isFrozen":"0","high24hr":"0.00000019","low24hr":"0.00000017"},"BTC_BELA":{"id":8,"last":"0.00001191","lowestAsk":"0.00001191","highestBid":"0.00001174","percentChange":"0.13536701","baseVolume":"6.33896473","quoteVolume":"572949.02508918","isFrozen":"0","high24hr":"0.00001200","low24hr":"0.00001033"}}';

$arr = json_decode($json, true);

Foreach($arr as $key => $val){
    Extract($val);
    Echo $key ."\n";
    Echo $last ."\n";
    Echo $baseVolume ."\n\n";
}