Question

我正在从etherscan提取JSON数据，并尝试查看该事务中是否存在地址以查看其是否已发送或接收。

我想要的是查找所有从$字段中找到$ pa的地方，并将它们显示为“已发送事务，哈希= tx”，对于“至”字段则显示为相同。因此，最终我将获得所有交易的清单，并显示交易是已发送还是已接收。我当前的代码是：

$pa = '0xE460c28E4cE2e4aE0B934a3eeb8FD88134d26956'
$url = ("http://api.etherscan.io/api?module=account&action=txlist&address=0xE460c28E4cE2e4aE0B934a3eeb8FD88134d26956&startblock=0&endblock=99999999&sort=asc&apikey=MY API KEY");

$content = file_get_contents($url);
$json = json_decode($content, true);
$data = $json['result'];

foreach ($data as $txinfo)
{
    $from =  array($txinfo['from'].',');
    $to = array($txinfo['to'].',');

    if (in_array($pa, $from))
    {
        echo 'found';
    }
    else
    {
        echo 'not found';
    }
}

但是，即使它确实存在于数组中，也找不到地址。创建数组时，所有键均为[0]。

这是返回的JSON数据-

Array ( [0] => 0x87fdc1fd91cb8a7db0021f1d749027b7048874cb, ) Array ( [0] => 0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956, ) Array ( [0] => 0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956, ) Array ( [0] => 0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956, ) Array ( [0] => 0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956, )

这是我print_r（$ data）时的原始JSON数据

Answer 1

我将您的样本数据缩减为仅包含必要的部分。 in_array()似乎不是完成这项工作的正确工具。另外，您将需要不区分大小写的匹配，或者可以更简单地在strtolower()上调用$pa。通过将各自的匹配项存储在专用的子数组中，您可以在循环完成后将数据简单地输出到屏幕上。

代码：（Demo）

$data = [
    ['hash' => '0xa35b44d7e2ff09f2c936d04ad53f472b3cae46b449ddd307b3bb0a9aa67aa7a0',
     'from' => '0x87fdc1fd91cb8a7db0021f1d749027b7048874cb',
     'to' => '0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956'],
    ['hash' =>'0x3f85168d763793e350b4273c531b055d37121b170a48675ba5decd80b62442d5',
     'from' => '0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956',
     'to' => '0x1faae436c85a15f257f7ff7f02af1e608815bbd7'],
    ['hash' => '0x621de75f0a2a880e17efc2c40a310223c38fa19b71b2dae375a9bc4d4d794a1a',
     'from' => '0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956',
     'to' => '0x1faae436c85a15f257f7ff7f02af1e608815bbd7'],
    ['hash' => '0x4a32e142b627a1541d0dc5605ef9c52b7f586f02ab502d13d0503321622ba435',
     'from' => '0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956',
     'to' => '0x1faae436c85a15f257f7ff7f02af1e608815bbd7'],
    ['hash' => '0x0b40f67a334aae4cd54977e5e4cd5f54a2157f75441d5143d1eed4ba70f19b8f',
     'from' => '0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956',
     'to' => '0x1faae436c85a15f257f7ff7f02af1e608815bbd7']
];
$pa = strtolower('0xE460c28E4cE2e4aE0B934a3eeb8FD88134d26956');

$result = ['from' => [], 'to' => []];
foreach ($data as $set) {
    if ($pa == $set['from']) {
        $result['Sent'][] = $set['hash'];
    } elseif ($pa == $set['to']) {
        $result['Received'][] = $set['hash'];
    }
}

echo "For $pa\n";
echo "Sent Transactions:\n\t" , implode("\n\t", $result['Sent']) , "\n";
echo "Received Transactions:\n\t" , implode("\n\t", $result['Received']);

输出：

For 0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956
Sent Transactions:
    0x3f85168d763793e350b4273c531b055d37121b170a48675ba5decd80b62442d5
    0x621de75f0a2a880e17efc2c40a310223c38fa19b71b2dae375a9bc4d4d794a1a
    0x4a32e142b627a1541d0dc5605ef9c52b7f586f02ab502d13d0503321622ba435
    0x0b40f67a334aae4cd54977e5e4cd5f54a2157f75441d5143d1eed4ba70f19b8f
Received Transactions:
    0xa35b44d7e2ff09f2c936d04ad53f472b3cae46b449ddd307b3bb0a9aa67aa7a0

Answer 2

您将«，»附加到$ from。这就是为什么您的in_array（）返回false

的原因

编辑：

$ pa ='0xE460c28E4cE2e4aE0B934a3eeb8FD88134d26956'

[from] => 0xe460c28e4ce2e4ae0b934a3eeb8fd88134d26956

In_array（）：

注意：如果needle是字符串，则以区分大小写的方式进行比较。

从JSON数据检查数组中是否存在值

2 个答案: