How to integrate bulk SMS API in PHP?

To integrate Bulk SMS in PHP, create an account with SMSINDIAHUB, generate your API key, and include the provided cURL request snippet in your application to send automated messages.

Why is SMS API integration important?

SMS API integration allows websites, apps, and CRMs to automate notifications, OTP authentication, and transactional alerts directly through a reliable high-speed gateway.

Free SMS API for Developers | Free SMS Gateway API

PHP cURL Integration Script

Compatible with PHP 7.x & 8.x

<?php
// Replace with your username
$user = "your_user_name";
// Replace with your API KEY (We have sent API KEY on activation email, also available on panel)
$password = "your_password";
// Replace with the destination mobile Number to which you want to send sms
$msisdn = "Mobile_no";
// Replace if you have your own Six character Sender ID, or check with our support team.
$sid = "SMSHUB";
// Replace with client name
$name = "Anurag Sharrma";
// Replace if you have OTP in your template.
$OTP = "6765R";
// Replace with your Message content
$msg = "Dear ram, Your OTP for cloudwireless.in is : 6547";
$msg = urlencode($msg);
$fl = "0";
// if you are using transaction sms api then keep gwid = 2 or if promotional then remove this parameter
$gwid = "2";
// For Plain Text, use "txt" ; for Unicode symbols or regional Languages like hindi/tamil/kannada use "uni"
$type = "txt";
//--------------------------------------
//step1
$cSession = curl_init();
//step2
curl_setopt($cSession,CURLOPT_URL,"http://cloud.smsindiahub.in/vendorsms/pushsms.aspx?user=".$user."&password=".$password."&msisdn=".$msisdn."&sid=".$sid."&msg=".$msg."&fl=0&gwid=2");
curl_setopt($cSession,CURLOPT_RETURNTRANSFER,true);
curl_setopt($cSession,CURLOPT_HEADER, false);
//step3
$result=curl_exec($cSession);
//step4
curl_close($cSession);
//step5
echo $result;
?>

📌 Implementation Steps:

Initialize cURL session via curl_init().
Set the target endpoint URL with required query parameters.
Execute request and capture output via curl_exec().
Close connection and handle the gateway response.

⚡ Best Practices:

Always URL-encode the message body using urlencode().
For Transactional & OTP messages, include &gwid=2.
For Regional / Unicode messages, set &dc=8.

Classic ASP (VBScript) Sample

ServerXMLHTTP Protocol

<%
'Set the values same as you use in your smsindiahub.in account
sUser = "user"
sPassword ="password"
'Set the mobile number on which you want to send SMS
sNumber = "91123456789"
'Your Message
sMessage = "Test SMS from SMS INDIA HUB"
'Your approved sender id
sSenderID = "WEBSMS"
Dim objXmlHttpMain , sURL
sURL="http://cloud.smsindiahub.in/vendorsms/pushsms.aspx?user=" & sUser & "&password=" & sPassword & "&msisdn=" & sNumber & "&sid=" & sSenderID & "&msg=" & sMessage & "&fl=0"
Set objXmlHttpMain = Server.CreateObject("Msxml2.ServerXMLHTTP")
on error resume next
objXmlHttpMain.open "GET",sURL, False
objXmlHttpMain.setRequestHeader "Content-Type", "text/urlencoded"
objXmlHttpMain.send
'Store response
response.Write (objXmlHttpMain.responseText)
%>

API Parameters Guide:

user: Your login username.

password: Your login password.

msisdn: Destination 10-digit mobile number or multiple numbers (+91).

sid: Approved 6-character TRAI DLT sender ID.

msg: Message content (edit dynamic field in ##Field##).

fl: 1 for flash message, 0 for standard message.

gwid: 2 for Transactional / OTP route.

Note: For Transaction SMS, ensure &gwid=2 is passed.

ASP.NET (C#) Code Snippet

HttpWebRequest & StreamReader Implementation

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web;

string sUser = "USERNAME";
string spwd = "PASSWORD";
string sNumber = Session["Mobile"].ToString();
string sMessage = "Hi Thanks for Signing-up";
string sSenderID = "WEBSMS";
string sURL = "http://cloud.smsindiahub.in/vendorsms/pushsms.aspx?user=" + sUser + "&password=" + spwd + "&msisdn=" + sNumber + "&sid=" + sSenderID + "&msg=" + sMessage + "&fl=0";
string sResponse = GetResponse(sURL);
Response.Write(sResponse);

public static string GetResponse(string sURL)
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(sURL);
    request.MaximumAutomaticRedirections = 4;
    request.Credentials = CredentialCache.DefaultCredentials;
    try
    {
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        Stream receiveStream = response.GetResponseStream();
        StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);
        string sResponse = readStream.ReadToEnd();
        response.Close();
        readStream.Close();
        return sResponse;
    }
    catch
    {
        return "";
    }
}

VB.NET Code Snippet

ASP.NET WebForms Page_Load Handler

Imports System
Imports System.IO
Imports System.Net
Imports System.Text

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim sURL As String
        Dim objReader As StreamReader
        sURL = "http://cloud.smsindiahub.in/vendorsms/pushsms.aspx?user=YourUserName&password=YourPassword&msisdn=919898XXXXXX,919227XXXXXX&sid=WEBSMS&msg=Test SMS From SMSHUB&fl=0"
        Dim sResponse As WebRequest
        sResponse = WebRequest.Create(sURL)
        Try
            Dim objStream As Stream
            objStream = sResponse.GetResponse.GetResponseStream()
            objReader = New StreamReader(objStream)
            Response.Write(objReader.ReadToEnd())
            objReader.Close()
        Catch ex As Exception
            Response.Write(ex.Message)
        End Try
    End Sub
End Class

SMS INDIA HUB™ — Mobile Marketing Solutions Worldwide. For technical support, contact support@smsindiahub.in.

Java HTTP POST Application Class

URLConnection & URLEncoder Pattern

package javaapplication;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class SMSINDIAHUB {
    public static String retval = "";

    public static String SMSSender(String user, String password, String msisdn, String msg, String sid, String fl) {
        String rsp = "";
        try {
            // Construct The Post Data
            String data = URLEncoder.encode("user", "UTF-8") + "=" + URLEncoder.encode(user, "UTF-8");
            data += "&" + URLEncoder.encode("password", "UTF-8") + "=" + URLEncoder.encode(password, "UTF-8");
            data += "&" + URLEncoder.encode("msisdn", "UTF-8") + "=" + URLEncoder.encode(msisdn, "UTF-8");
            data += "&" + URLEncoder.encode("msg", "UTF-8") + "=" + URLEncoder.encode(msg, "UTF-8");
            data += "&" + URLEncoder.encode("sid", "UTF-8") + "=" + URLEncoder.encode(sid, "UTF-8");
            data += "&" + URLEncoder.encode("fl", "UTF-8") + "=" + URLEncoder.encode(fl, "UTF-8");

            // Push the HTTP Request
            URL url = new URL("http://cloud.smsindiahub.in/vendorsms/pushsms.aspx");
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
            OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(data);
            wr.flush();

            // Read The Response
            BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = rd.readLine()) != null) {
                retval += line;
            }
            wr.close();
            rd.close();
            System.out.println(retval);
            rsp = retval;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return rsp;
    }

    public static void main(String[] args) {
        String response = SMSSender("username", "password", "918103857676", "message", "WEBSMS", "0");
        System.out.println(response);
    }
}

Java (Legacy Class Implementation)

Compatible with Legacy JRE 6/7/8

package javaapplication;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class SMSINDIAHUB {
    public static String retval = "";

    public static String SMSSender(String user, String password, String msisdn, String msg, String sid, String fl) {
        String rsp = "";
        try {
            String data = URLEncoder.encode("user", "UTF-8") + "=" + URLEncoder.encode(user, "UTF-8");
            data += "&" + URLEncoder.encode("password", "UTF-8") + "=" + URLEncoder.encode(password, "UTF-8");
            data += "&" + URLEncoder.encode("msisdn", "UTF-8") + "=" + URLEncoder.encode(msisdn, "UTF-8");
            data += "&" + URLEncoder.encode("msg", "UTF-8") + "=" + URLEncoder.encode(msg, "UTF-8");
            data += "&" + URLEncoder.encode("sid", "UTF-8") + "=" + URLEncoder.encode(sid, "UTF-8");
            data += "&" + URLEncoder.encode("fl", "UTF-8") + "=" + URLEncoder.encode(fl, "UTF-8");

            URL url = new URL("http://cloud.smsindiahub.in/vendorsms/pushsms.aspx");
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
            OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(data);
            wr.flush();

            BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = rd.readLine()) != null) {
                retval += line;
            }
            wr.close();
            rd.close();
            System.out.println(retval);
            rsp = retval;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return rsp;
    }
}

📡

Documentation of SMPP API

Short Message Peer-to-Peer (SMPP v3.4) protocol specification for high-volume aggregators, telecommunication providers, and high-throughput enterprise systems.

📥 Download SMPP API Document (PDF)

📞

Voice OTP API

Voice Call API will be provided on demand.

Automated high-priority voice calling gateway for failover OTP delivery, 2FA voice verification, and interactive voice response (IVR) broadcast campaigns.

💬 Request Voice OTP API Access →

📄

HTTP API Document

Comprehensive reference guide for HTTP GET/POST endpoints, query parameter definitions, response codes, and DLR delivery receipt webhooks.

📥 Download HTTP API Document (PDF)

Unicode Regional Language Message API

Support for Hindi, Marathi, Bengali, Tamil, Telugu, Gujarati, and other Indic scripts

# 1. Promotional Unicode Message API (Requires dc=8)
http://cloud.smsindiahub.in/vendorsms/pushsms.aspx?user=yourUserID&password=yourPassword&msisdn=919898xxxxxx&sid=SenderId&msg=%E0%A4%A8%E0%A4%AE%E0%A4%B8%E0%A5%8D%E0%A4%A4%E0%A5%87&fl=0&dc=8

# 2. Transactional Unicode Message API (Requires dc=8 & gwid=2)
http://cloud.smsindiahub.in/vendorsms/pushsms.aspx?user=yourUserID&password=yourPassword&msisdn=919898xxxxxx&sid=SenderId&msg=%E0%A4%A8%E0%A4%AE%E0%A4%B8%E0%A5%8D%E0%A4%A4%E0%A5%87&fl=0&dc=8&gwid=2

Important Unicode Note: Ensure the message parameter msg is URL-encoded in UTF-8 or UCS-2 format and include &dc=8 so the gateway parses the payload as multi-byte characters.

International Bulk SMS API on SMPP

Global operator routing across 200+ countries

HTTP API to submit messages on SMPP :
http://[SERVER_IP]:[PORT]/bulksms/bulksms?username=XXXX&password=YYYYY&type=Y&dlr=Z&destination=QQQQQQQQQ&source=RRRR&message=SSSSSSSS&url=KKKK

Default Host / Port:
:XXX.XXX.XXX.XXX
:8080

📥 Download International API Document (PDF)