WhatsSMS Global SMS Gateway

<?php
// Send Worldwide SMS via WhatsSMS Global SMS Gateway ($0.04/SMS)
$apiUrl = "https://app.whatssms.io/api/send/sms";
$apiSecret = "YOUR_API_SECRET"; // From Dashboard -> Tools -> API Keys

$data = [
    'secret'  => $apiSecret,
    'mode'    => 'credits', // Uses your monthly free or purchased credits
    'gateway' => '2',       // 2 = WhatsSMS Global SMS Gateway
    'phone'   => '+447770649691', // Recipient phone with country calling code
    'message' => 'Your verification code is: 482910. Valid for 10 mins.'
];

$ch = curl_init($apiUrl);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = json_decode(curl_exec($ch), true);
curl_close($ch);

if (isset($response['status']) && (int)$response['status'] === 200) {
    echo "SMS Sent Successfully! Message ID: " . $response['data']['id'];
} else {
    echo "Failed to send SMS: " . ($response['message'] ?? 'Unknown error');
}