response-parsing.php

<?php

$f = file_get_contents('response-example.json');

function getBkashURL($json_str)
// Return Bkash redirect URL from api response json string.
{
	$data_array = json_decode($json_str);
	$desc = $data_array->desc;

	foreach ($desc as $channel) {
		if ($channel->gw == 'bkash') {
			$bkashURL = $channel->redirectGatewayURL;
			break;
		}
	}

	return $bkashURL;
}


function getDirectURL($json_str, $gw)
// Returns direct payment URL for $gw eg, bkash, nagad etc.
{
	$data_array = json_decode($json_str);
	$desc = $data_array->desc;

	foreach ($desc as $channel) {
		if ($channel->gw == $gw) {
			$bkashURL = $channel->redirectGatewayURL;
			break;
		}
	}

	return $bkashURL;
}

function redirectUser($url)
// Redirects the user to specified $url
{
	echo <<<javascript
		<script type="text/javascript">
		window.location.href = "$url"
		</script>
	javascript;
}

echo redirectUser(getBkashURL($f));