نمونهٔ کامل

<?php
const DQ_API  = 'https://dailyquiz.ir/wp-json/daily-quiz/v1';
const DQ_KEY  = 'dqk_your_api_key';
const EXAM    = 'exam_AbCdEf123';

function dq_call( $method, $path, $token, $body = null ) {
    $args = array(
        'method'  => $method,
        'timeout' => 20,
        'headers' => array(
            'Authorization' => 'Bearer ' . $token,
            'Content-Type'  => 'application/json',
        ),
    );
    if ( null !== $body ) {
        $args['body'] = wp_json_encode( $body );
    }
    $res = wp_remote_request( DQ_API . $path, $args );
    return json_decode( wp_remote_retrieve_body( $res ), true );
}

// 1) Send the code.
$otp = dq_call( 'POST', '/auth/request-otp', DQ_KEY, array( 'phone' => '09123456789', 'exam_token' => EXAM ) );

// 2) After the user types the code:
$session = dq_call( 'POST', '/auth/verify-otp', DQ_KEY, array( 'otp_token' => $otp['otp_token'], 'code' => '48213' ) );

// 3) Questions.
$exam = dq_call( 'GET', '/exams/' . $session['exam_id'] . '/questions', $session['session_token'] );

// 4) Submit answers (option index, zero-based).
$result = dq_call( 'POST', '/exams/' . $session['exam_id'] . '/submit', $session['session_token'], array(
    'answers' => array( array( 'question_id' => $exam['questions'][0]['id'], 'answer' => 1 ) ),
) );
echo $result['score'];