Question

我制作了一个简单的scipt，用于从API获取数据。 Evryhing工作正常，但如果价格差异为负或正面，我想添加箭头。

类似的东西：

+5,15⬆ -2,44⬇

有人能给我一个提示怎么做吗？谢谢！

$url = "https://min-api.cryptocompare.com/data/pricemultifull?fsyms=BTC,ETH,XRP,LTC,BCH&tsyms=USD&e=Bitstamp";
$data = json_decode(file_get_contents($url), true);

// get btc price
echo "BTC: ";
echo "<span class='price'>";
echo $data['DISPLAY']['BTC']['USD']['PRICE'] . " ";
echo "</span>";

// get btc difference
echo "<span class='difference'>";
echo $data['DISPLAY']['BTC']['USD']['CHANGEPCT24HOUR'] . "%";
echo "</span>";

echo "<hr>";

Answer 1

我会添加一项检查，看看它是否大于这样：

if($data['DISPLAY']['BTC']['USD']['CHANGEPCT24HOUR'] > 0){
    echo '⬆';
}else{
    echo '⬇';
}

整个脚本看起来像：

    $url = "https://min-api.cryptocompare.com/data/pricemultifull?fsyms=BTC,ETH,XRP,LTC,BCH&tsyms=USD&e=Bitstamp";
$data = json_decode(file_get_contents($url), true);

// get btc price
echo "BTC: ";
echo "<span class='price'>";
echo $data['DISPLAY']['BTC']['USD']['PRICE'] . " ";
echo "</span>";

// get btc difference
echo "<span class='difference'>";
if($data['DISPLAY']['BTC']['USD']['CHANGEPCT24HOUR'] > 0){
    echo '⬆';
}else{
    echo '⬇';
}
echo $data['DISPLAY']['BTC']['USD']['CHANGEPCT24HOUR'] . "%";
echo "</span>";

echo "<hr>";

Answer 2

$change = (float) $data['DISPLAY']['BTC']['USD']['CHANGEPCT24HOUR'];

$change_increased = $change > 0;
$change_decreased = $change < 0;

$change_increased 
  && print('+' . $change . '⬆');
$change_decreased 
  && print($change . '⬇');

我假设CHANGEPCT24HOUR是您要输出的变量

还有一个问题是API输入是否被视为用户输入以及您希望保护自己的程度，但我认为这是另一个问题/答案

如何将元素添加到获取的数据

2 个答案: