从PHP中的JSON解码数据中提取FIRST结果

Question

I have a script:

$json_url = "https://blockchain.info/ticker";
$json = file_get_contents($json_url);
$json=str_replace('},

]',"}

]",$json);
$data = json_decode($json);

echo "$" . ($data->USD->last);

This works perfect!

Now I have a second version of this:

$json_url3 = "https://blockchain.info/da/unconfirmed-transactions?format=json";
$json3 = file_get_contents($json_url3);
$json3=str_replace('},

]',"}

]",$json3);
$data3 = json_decode($json3);
echo "Latest hash: " . ($data3->txs->hash) . "<br>";

Why does the send script not work? I have a $json2 running without any issues with another API call as well.

Answer 1

Variable txs is an array of objects.

Your last line should be written as:

echo "Latest hash: " . ($data3->txs[0]->hash) . "<br>";

It outputs:

Latest hash: fd37b1ddfbe08d485a62bb3aeb7c9088e7dd3a352ac9e9e8eb6f170a9b4210cd