OTP is One Time Password. How to send OTP sms using php is the most common question today. Most of the web applications and mobile apps required to send OTP so that the user strong verification can be done and reduce the risk of unwanted data on the server. To use OTP service in any of the application it is required to have Transactional SMS API which is great to send sms round the clock with instant delivery.

HTTP API is favorite of developers which is easy to integrate also. Secure http api are available these days where just need to pass the mobile number and the OTP text only which need to be delivered.

how to send otp sms using php

Bulk SMS API are available for OTP almost for all the platforms like php, java, c#, .net and can be integrated in any type of mobiles it may be android, iphone or any other.

A sample code is as below:

$sendsms->schedule_sms(“99xxxxxxxx”, “message”
, “http://www.yourdomainname.domain/yourdlrpage&msgid=XX”, ‘type’,
’20mmyyyyhhmm’);
$sendsms->unicode_sms(“99xxxxxxxx”,”unicode msg”,
“http://www.yourdomainname.domain/yourdlrpage&msgid=XX”,’1′);
$sendsms->messagedelivery_status(“messageid”);
$sendsms->groupdelivery_status(“groupid”);

//$sendsms->setWorkingKey(“A5f9819ce60839335f72d4c723109bcea”);
//$sendsms->setSenderId(“DEMOAC”);
//$sendsms->setapiurl(“alerts.prioritysms.com/api”);
?>

===========
sendsms.php
===========

<?php
class sendsms
{
private $api_url;
private $time;
private $unicode;
private $working_key;
private $start;
private $sender_id;
public  $api;
public  $wk;
public  $sid;
public  $to;

/**function to set the working key
*
* @param string_type $wk:helps to change the working_key
*/
function setWorkingKey($wk)
{
$this->working_key=$wk;
}
/**function to set sender id
*
* @param string_type $sid:helps to change sender_id
*/
function setSenderId($sid)
{
$this->sender_id=$sid;
}
/**function to set API url
*
* @param string_type $apiurl:it is used to set api url
*/
function setapiurl($apiurl)
{        $this->api=$apiurl;
$a=strtolower(substr($apiurl,0,7));

if ($a==”http://”) //checking if already contains http://
{
$api_url=substr($apiurl,7,strlen($apiurl));
$this->api_url=$api_url;
$this->start=”http://”;
}
elseif ($a==”https:/”) //checking if already contains htps://
{
$api_url=substr($apiurl,8,strlen($apiurl));
$this->api_url=$api_url;
$this->start=”https://”;
}
else {
$this->api_url=$apiurl;
$this->start=”http://”;
}
}
/** function to intialize constructor
*
* @param string_type $wk: it is working_key
* @param string_type $sd: it is sender_id
* @param string_type $apiurl: it is api_url
*          used for intializing the parameter
*/
function __construct($apiurl,$wk,$sd)
{
$this->setWorkingKey($wk);
$this->setSenderId($sd);
$this->setapiurl($apiurl);
}
/**
* function to send sms
*
*/
function send_sms($to,$message,$dlr_url,$type=”xml”)
{
$this->process_sms($to,$message,$dlr_url,$type=”xml”,$time=”null”,$unicode=”null”);
}
/**
* function to schedule sms
*
*/
function schedule_sms($to,$message,$dlr_url,$type=”xml”,$time)
{
$this->process_sms($to,$message,$dlr_url,$type=”xml”,$time,$unicode=”);
}
/**
* function to send unicode message
*/
function unicode_sms($to,$message,$dlr_url,$type=”xml”,$unicode)
{
$this->process_sms($to,$message,$dlr_url,$type=”xml”,$time=”,$unicode);
}

/**
* function to send out sms
* @param string_type $to : is mobile number where message needs to be send
* @param string_type $message :it is message content
* @param string_type $dlr_url: it is used for delivering report to client
* @param string_type $type: type in which report is delivered
* @return output        $this->api=$apiurl;
*/
function process_sms($to,$message,$dlr_url=””,$type=”xml”,$time=”,$unicode=”)
{
$message=urlencode($message);
$this->to=$to;
$to=substr($to,-10) ;
$arrayto=array(“9”, “8” ,”7″);
$to_check=substr($to,0,1);

if(in_array($to_check, $arrayto))
$this->to=$to;
else echo “invalid number”;

if($time==’null’)
$time=”;
else
$time=”&time=$time”;
if($unicode==’null’)
$unicode=”;
else
$unicode=”&unicode=$unicode”;
$url=”$this->start$this->api_url/web2sms.php?workingkey=$this->working_key&sender=$this->sender_id&to=$to&message=$message&type=$type&dlr_url=$dlr_url$time$unicode”;
$this->execute($url);
}
/**
* function to check message delivery status
* string_type $mid : it is message id
*/
function messagedelivery_status($mid)
{
$url=”$this->start$this->api_url/status.php?workingkey=$this->working_key&messageid=$mid”;
$this->execute($url);
}
/**
* function to check group message delivery
*  string_type $gid: it is group id
*/
function groupdelivery_status($gid)
{
$url=”$this->start$this->api_url/groupstatus.php?workingkey=$this->working_key&messagegid=$gid”;
$this->execute($url);
}

/**
* function to request to clent url
*/
function execute($url)
{
$ch=curl_init();
// curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$output=curl_exec($ch);
curl_close($ch);
echo $output;
return $output;
}
}
?>

The above is the answer of query: how to send OTP sms using php