从 curl 和 json_decode 检索数据

Question

I am trying to extract the individual data strings from a curl and json_decode result, but cannot manage to target the array elements correctly:

API:

$ch = curl_init($uri);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('apisign:'.$sign));
$execResult = curl_exec($ch);
$obj = json_decode($execResult);

Result:

{"success":true,"message":"","result":{"Bid":0.04350003,"Ask":0.04395399,"Last":0.04350003}}

PHP:

echo 'Bid: '.$obj['result']['Bid'].'<br/>';
echo 'Ask: '.$obj['result']['Ask'].'<br/>';
echo 'Last: '.$obj['result']['Last'].'<br/>';

Also tried:

echo 'Bid: '.$obj['Bid'].'<br/>';
echo 'Ask: '.$obj['Ask'].'<br/>';
echo 'Last: '.$obj['Last'].'<br/>';

Answer 1

You need to add a true parameter to your json_decode

Like

json_decode($execResult, true);

Else you get a stdObject with the decoded data.

Then you should be able to use $obj['result']['Bid'] aso.

Answer 2

The use of json_decode has an optional second parameter - boolean - that either returns the data as an object or as an array.

{"success":true,"message":"","result":{"Bid":0.04350003,"Ask":0.04395399,"Last":0.04350003}}

$obj = json_decode( $execResult ); /* will return an object */
echo $obj->result->Bid;

$obj = json_decode( $execResult, true ); /* will return an array */
echo $obj['result']['Bid'];

---

Just ran this as the test..

$data='{"success":true,"message":"","result":{"Bid":0.04350003,"Ask":0.04395399,"Last":0.04350003}}';

$obj = json_decode( $data ); /* will return an object */
echo $obj->result->Bid;

$obj = json_decode( $data, true ); /* will return an array */
echo $obj['result']['Bid'];

which displayed:

0.043500030.04350003

Answer 3

Use this way:

echo 'Bid: '.$obj->result->Bid.'<br/>';
echo 'Ask: '.$obj->result->Ask.'<br/>';
echo 'Last: '.$obj->result->Last.'<br/>';

Answer 4

let

$json = '{"success":true,"message":"","result":{"Bid":0.04350003,"Ask":0.04395399,"Last":0.04350003}}';

$obj = json_decode($json, true);// decode and convert it in array 

echo 'Bid: '.$obj['result']['Bid'].'<br/>';
echo 'Ask: '.$obj['result']['Ask'].'<br/>';
echo 'Last: '.$obj['result']['Last'].'<br/>';

Answer 5

Try using json_decode($string, true); as an array

$ch = curl_init($uri);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('apisign:'.$sign));
$execResult = curl_exec($ch);
$obj = json_decode($execResult, true);

echo 'Bid: '.$obj['result']['Bid'].'<br/>';
echo 'Ask: '.$obj['result']['Ask'].'<br/>';
echo 'Last: '.$obj['result']['Last'].'<br/>';

OR using json_decode($string); as an object

$ch = curl_init($uri);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('apisign:'.$sign));
$execResult = curl_exec($ch);
$obj = json_decode($execResult);

echo 'Bid: '.$obj->result->Bid.'<br/>';
echo 'Ask: '.$obj->result->Ask.'<br/>';
echo 'Last: '.$obj->result->Last.'<br/>';