Getting data from JSON - php

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"];

Answer 2

I have printed the result it will produce following output
echo "<pre>";
print_r(json_decode($result, true));
Array
(
[0] => Array
(
[id] => bitcoin
[name] => Bitcoin
[symbol] => BTC
[rank] => 1
[price_usd] => 3821.37
[price_btc] => 1.0
[24h_volume_usd] => 2089880000.0
[market_cap_usd] => 63298556016.0
[available_supply] => 16564362.0
[total_supply] => 16564362.0
[percent_change_1h] => -1.72
[percent_change_24h] => -4.57
[percent_change_7d] => -15.76
[last_updated] => 1505359771
[price_eur] => 3214.536444
[24h_volume_eur] => 1758007056.0
[market_cap_eur] => 53246745321.0
)
)
so you can use foreach loop if your api contain multiple
$data=json_decode($result, true);
foreach($data as $key=>$val){
echo $val->id;
}
full code
<?php
$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);
$data=json_decode($result, true));
foreach($data as $key=>$val){
echo $val->id;
}

Answer 3

The setting you are looking for is allow_url_fopen.
You have two ways of getting around it without changing php.ini, one of them is to use fsockopen(), and the other is to use cURL.
I recommend using cURL over file_get_contents() anyways, since it was built for this.