Shortcode parameter not working in WordPress - php

Question

I am trying to pass amount parameters in url from the shortcode. The from and to attributes are working fine but the amount attribute is not working. The output shows the value of 1.
using the shortcode like this:
[exchange_rate from="USD" to="EUR" amount="100"]
function exchange_rate_shortcode($atts) {
$atts = shortcode_atts(array(
'from' => 'AED',
'to' => 'NPR',
'amount' => '1',
), $atts);
$url = "https://api.fastforex.io/convert?from=" . $atts['from'] . "&to=" . $atts['to'] . "&amount=" . $atts['amount'] . "&api_key=xxxx-xxxxx-xxxx";
$result = file_get_contents($url);
$result = json_decode($result, true);
return number_format((float)$result['result']['rate'], 2, '.', '') . " " . $atts['to'];
}
add_shortcode('exchange_rate', 'exchange_rate_shortcode');

Answer 1

Perhaps you somehow wrote the word "amount" wrong and therefore an error occurs. To avoid confusion, use the build_query function.
Your code will look like this:htt
function exchange_rate_shortcode($atts)
{
$atts = shortcode_atts(array(
'from' => 'AED',
'to' => 'NPR',
'amount' => '1',
'api_key' => 'xxxx-xxxxx-xxxx',
), $atts);
// to make sure the correct value type is specified
$atts['amount'] = (float)$atts['amount'];
$url = "https://api.fastforex.io/convert?" . build_query($atts);
$result = file_get_contents($url);
if ( ! empty($result)) {
$result = json_decode($result, true);
return number_format((float)$result['result']['rate'], 2, '.', '') . " " . $atts['to'];
}
return '';
}
add_shortcode('exchange_rate', 'exchange_rate_shortcode');