I am trying to make a request to the coinbase api like this
$url = "https://api.gdax.com/products/BTC-USD/candles?start=".date($format,$starting_date)."&end=".date($format,$ending_date)."&granularity=".$granularity;
and then I pass that in file_get_contents($url)
but it gives me an error
file_get_contents(https://api.gdax.com/products/BTC-USD/candles?start=2015-05-07&end=2015-05-08&granularity=900
): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request.
The problem of course is when the '&' gets changed into '&'.
Posting this because it worked best for me. I know it is an old question.
I found that when building the query using http_build_query
the ampersand problem went away.
$url = 'https://example.url';
// http_build_query builds the query from an array
$query_array = array (
'search' => $string,
'from' => $from,
'to' => $to,
'format' => 'json'
);
$query = http_build_query($query_array);
$result = file_get_contents($url . '?' . $query);
edit: just saw @joshi s answer (actually followed the link), and http_build_query is used there.
This can happen when one of the parameters you send is not urlencode
d.
When php sees malformed url (e,g: with spaces or other url blacklisted characters) it urlencode's the full request.
It seems you need define an user agent. Try this;
$url = "https://api.gdax.com/products/BTC-USD/candles?start=2015-05-07&end=2015-05-08&granularity=900";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_USERAGENT,"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
var_dump($result);
If you still insist on using file_get_contents
then it is still possible to use user agent;
$url = "https://api.gdax.com/products/BTC-USD/candles?start=2015-05-07&end=2015-05-08&granularity=900";
$options = array(
"http"=>array(
"header"=>"User-Agent: Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.102011-10-16 20:23:10\r\n" // i.e. An iPad
)
);
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
var_dump($result);
For more information you can check file_get_contents and stream_context_create (for using headers) documentation
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