How to get holding in php

[Ved]

I want get holding details using php. I try but output given blank. Please help for right code.
My code is

<?php
$keyapi = 'API_KEY:SECRET_KEY';
$chbal = curl_init('https://apiconnect.angelbroking.com/
rest/secure/angelbroking/portfolio/
v1/getHolding');
curl_setopt($chbal, CURLOPT_USERPWD, $keyapi); // API KEY and secret key
curl_setopt($chbal, CURLOPT_RETURNTRANSFER,0);
curl_setopt($chbal, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));
curl_setopt($chbal, CURLOPT_HTTPHEADER, array('accept: application/json'));
$return = curl_exec($chbal);
curl_close($chbal);
print_r($return);
?>