Send SMS with PHP

// 1 — PRIMARY — use this
https://www.isms.com.my/isms_send_all_id.php
// 2 — Mirror — backup only
https://smtpapi2.vocotext.com/isms_send_all_id.php
// 3 — Mirror — backup only
https://smtpapi.vocotext.com/isms_send_all_id.php
// 4 — Mirror — backup only
https://ww3.isms.com.my/isms_send_all_id.php

<?php

$apiUrl = 'https://www.isms.com.my/isms_send_all_id.php';

$params = [
    'un'          => 'your_username',    // iSMS account username
    'pwd'         => 'your_password',    // iSMS account password
    'dstno'       => '601X-XXXXXXX',     // Recipient — full international format
    'msg'         => 'Hello from iSMS!', // Message body (URL-encoded auto by http_build_query)
    'type'        => '1',               // 1 = ASCII (English/BM), 2 = Unicode (Chinese/Arabic)
    'agreedterm'  => 'YES',             // Must be YES
    'sendid'      => 'MyBrand',         // Optional: Sender ID (max 11 chars, alphanumeric)
];

$ch = curl_init($apiUrl);
curl_setopt($ch, CURLOPT_POST,            true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_TIMEOUT,        30);
curl_setopt($ch, CURLOPT_POSTFIELDS,     http_build_query($params));

$response = curl_exec($ch);
$curlError = curl_error($ch);
curl_close($ch);

if ($curlError) {
    echo 'Connection error: ' . $curlError;
} elseif (strpos($response, '2000') !== false) {
    // Success — extract transaction ID
    $trxId = explode(':', $response)[1] ?? '';
    echo 'SMS sent! Transaction ID: ' . trim($trxId);
} else {
    echo 'Failed: ' . $response; // e.g. -1004 = Insufficient credits
}

$recipients = ['601X-XXXXXXX', '601X-XXXXXXX', '601X-XXXXXXX'];

$params['dstno'] = implode(';', $recipients); // Semicolon-separated
$params['msg']   = 'Dear customer, your order is confirmed!';

// ... same cURL setup as above