Gogr228

$curl = curl_init();
curl_setopt_array($curl, [
    CURLOPT_URL => 'https://api.vk.com/method/wall.post',
    CURLOPT_POST => true,
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_SSL_VERIFYHOST => false,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POSTFIELDS => [
        'owner_id' => '',
        'message' => '',
        'access_token' => '',
        'v' => '5.85'
    ]
]);
$response = curl_exec($curl);
if ($response === false) {
    die('Во время запроса произошла ошибка!'.PHP_EOL.curl_errno($curl).' - '.curl_error($curl));
}

$response = json_decode($response, true);
if (isset($response['error'])) {
    die('Ошибка VK API!'.PHP_EOL.$response['error']['error_code'].' - '.$response['error']['error_msg']);
}
curl_close($curl);

$response = $response['response'];
var_dump($response);