PDFShift PHP curl_ request

pdfshift.php

<?php
/**
 * Example of usage:
 * ```
 * pdfshift('your_api_key', array(
 *     'source' => 'http://www.example.com',
 *     'use_print' => true
 * ));
 */
function pdfshift($apiKey, $params) {
    $curl = curl_init();

    curl_setopt_array($curl, array(
        CURLOPT_URL => "https://api.pdfshift.io/v3/convert/pdf",
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POST => true,
        CURLOPT_POSTFIELDS => json_encode($params),
        CURLOPT_HTTPHEADER => array('Content-Type:application/json'),
        CURLOPT_USERPWD => 'api:'.$apiKey
    ));

    $response = curl_exec($curl);
    $error = curl_error($curl);
    $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    curl_close($curl);

    if (!empty($error)) {
        throw new Exception($error);
    } elseif ($statusCode >= 400) {
        $body = json_decode($response, true);
        if (isset($body['error'])) {
            throw new Exception($body['error']);
        } else {
            throw new Exception($response);
        }
    }

    return $response;
}