Send Soap by PHP composer fail load class

[nitiphone2021]

Dear All.
Now I am trying to send Soap to server by PHP code
I install composer and require soapclient but on my PHP code is fail

This is my command for composer
composer require phpro/soap-client
This is PHP code file name
testSendSMS.php

require_once 'vendor/autoload.php';
$operator = "http://ltcservice..com:5577/Services.asmx?WSDL";
$privateKey = "BDX89Cxfpp";
$headerSMS = "TEST"; // TEST
$userid = "BDX";
$txtTel ="2059545445659";
$newRegCode_exp = rand();
$messageBody = "Test SMS";
//$serverIP = $_SERVER['REMOTE_ADDR'];
$serverIP = "172.28.17.61";
$trans_id = "BDX".rand();
//$trans_id = "123456";
$data = $serverIP.$trans_id;
$messageBody = $serverIP.$trans_id;
echo '<br/>'.$data. " >=> " . exec("java -jar encrypt.jar ".$data." ".$privateKey, $key);
echo '<br/>'.$key[1]. " >=> " . exec("java -jar decrypt.jar ".$key[1]." ".$privateKey, $output);
echo '<br/> encrypt result >=> '.$key[0];
if($key[0]=="OK"){
$header = array('userid' => $userid,
'trans_id' => $trans_id,
'key' => $key[1],
);
echo '<br/>';
print_r($header);
$client = new SoapClient($operator);
$msg = array(
'msisdn' => $txtTel,
'message' => $messageBody,
'headerSMS' => $headerSMS,
'header' => $header,
);
$requestmsg = array('msg'=>$msg);
echo '<br/>';
print_r($msg);
$data = $client->SendSMS($requestmsg);
echo '<br/>';
print_r($data);
}

Error Fatal error: Uncaught Error: Class 'SoapClient' not found in C:\xampp\htdocs\sms\SEND_SMS\testSendSMS.php:27 Stack trace: #0 {main} thrown in C:\xampp\htdocs\sms\SEND_SMS\testSendSMS.php on line 27

 

[gw1500se]

You need to install SoapClient separately. It is not normally installed by default. You don't specify what OS you are using but in Linux you need to do either:

sudo apt-get install php-soap

or

sudo yum install php-soap

depending on your flavor of *NIX.