Get available accommodations from Tommy Booking Support

index.php

<?php

define( 'WP_USE_THEMES', false );

require '../wp-blog-header.php';

$api_key = ''; 

$url = 'https://www.tommybookingsupport.com/api/boeking/get-event-data';

$data = array(
	'apikey'         => $api_key,
	'aankomstDatum'  => '2016-06-01',
	'aantalEenheden' => 14,
	'aantalPersonen' => 4,
	// 'accommodatie'   => 422,
	// 'groep' => 101,
);

$response = wp_remote_post( $url, array(
	'body' => $data,
) );

if ( 200 === wp_remote_retrieve_response_code( $response ) ) {
	$result = wp_remote_retrieve_body( $response );

	$data = json_decode( $result );

	var_dump( $data );
}