从JSON获取数据

Question

Just wondering if anyone knew what I was doing wrong here?

I am trying to get data from an API for bitcoin via php. However, I am getting no results from my php page.

$url = "https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=EUR";
    $json = file_get_contents($url);
    $json_data = json_decode($json, true);
    echo "ID: ". $json_data["id"];

However I am getting nothing show at all on the php page. If I use the code below, It works and dumps out the entire information. But, I would prefer to obtain the information separately, instead of one big dump.

$url = "https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=EUR";

$ch = curl_init();
// Disable SSL verification
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
// Will return the response, if false it print the response
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Set the url
curl_setopt($ch, CURLOPT_URL,$url);
// Execute
$result=curl_exec($ch);
// Closing
curl_close($ch);

var_dump(json_decode($result, true));

Anyone have any ideas why the first code block isn't working? Thanks! Very new to API and Json

Answer 1

Using cURL is much better

Updated code (needs error checking)

$url = "https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=EUR";

$ch = curl_init();
// Disable SSL verification
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
// Will return the response, if false it print the response
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Set the url
curl_setopt($ch, CURLOPT_URL,$url);
// Execute
$result=curl_exec($ch);
// Closing
curl_close($ch);

$json_data = json_decode($result, true);

foreach ($json_data as $item)
    echo "ID: ". $item["id"];