How to Integrate SMS Gateway in PHP

<?php
/**
 * Send SMS using OnlineSMSService API with cURL
 */
function sendSMS(string $to, string $message, string $senderId = 'YOURID'): array
{
    $apiKey  = 'YOUR_API_KEY';          // Replace with your key
    $apiUrl  = 'https://api.onlinesmsservice.com/v1/sms/send';

    $payload = json_encode([
        'to'      => $to,
        'message' => $message,
        'sender'  => $senderId,
        'type'    => 'transactional',   // or 'promotional'
    ]);

    $ch = curl_init($apiUrl);
    curl_setopt_array($ch, [
        CURLOPT_POST           => true,
        CURLOPT_POSTFIELDS     => $payload,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_TIMEOUT        => 30,
        CURLOPT_HTTPHEADER     => [
            'Content-Type: application/json',
            'Authorization: Bearer ' . $apiKey,
        ],
    ]);

    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    if (curl_errno($ch)) {
        $error = curl_error($ch);
        curl_close($ch);
        throw new RuntimeException("cURL error: {$error}");
    }

    curl_close($ch);

    $data = json_decode($response, true);
    $data['http_code'] = $httpCode;

    return $data;
}

// ── Usage ──────────────────────────────────────
try {
    $result = sendSMS('919876543210', 'Your OTP is 482910. Valid for 5 min.');
    echo "Status : {$result['status']}\n";
    echo "Msg ID : {$result['message_id']}\n";
} catch (RuntimeException $e) {
    echo "Error  : {$e->getMessage()}\n";
}

composer require onlinesmsservice/laravel-sms

SMS_API_KEY=your_api_key_here
SMS_SENDER_ID=YOURID
SMS_DEFAULT_TYPE=transactional

<?php
namespace App\Notifications;

use Illuminate\Notifications\Notification;
use OnlineSMSService\Laravel\SmsChannel;
use OnlineSMSService\Laravel\SmsMessage;

class OtpNotification extends Notification
{
    public function __construct(private string $otp) {}

    public function via($notifiable): array
    {
        return [SmsChannel::class];
    }

    public function toSms($notifiable): SmsMessage
    {
        return (new SmsMessage)
            ->to($notifiable->phone)
            ->text("Your OTP is {$this->otp}. Valid for 5 minutes.");
    }
}

// In your controller:
$user->notify(new OtpNotification('482910'));

{
  "status": "success",
  "message_id": "msg_abc123xyz",
  "to": "919876543210",
  "credits_used": 1,
  "credits_remaining": 9487
}