var dump of a JSON response returns NULL

Question

I'm writing a script to accept Bitcoin payments. My $json variable returns null. var_dump() returns NULL.

I am using the following code:

 $receiving_address = BITCOIN_ADDRESS;
    if(get_magic_quotes_gpc()){
        $callback_url = urlencode(stripslashes(CALLBACK_URL));
    }  else {
        $callback_url = urlencode(CALLBACK_URL);
    }

    $ch = curl_init("https://blockchain.info/api/receive?method=create&address=$receiving_address&shared=false&callback=$callback_url");
    curl_setopt($ch, CURLOPT_PROXY, '127.0.0.1:8888');
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $json=json_decode(curl_exec($ch),true);

    var_dump($json);
    echo $json[0]->text;

Answer 1

You should be aware of the chances that some code might not execute properly. Try the following code:

$response = curl_exec($ch);
if ($result === FALSE) {
   die("Curl failed with error: " . curl_error($ch));
}
$json = json_decode($response, true);
if (is_null($json)) {
   die("Json decoding failed with error: ". json_last_error());
}