Send sms from website in php

#Send sms from website in php 

public function send_text_message($sms_type = '', $to = "", $replace = array()) {
 
    $sms_info = sms data; 
    if ((isset($sms_info['username']) &&  $sms_info['username'] != '')   &&  (isset($sms_info['api_pwd']) &&  $sms_info['api_pwd'] != ''))  
{ 
     $api_username = $sms_info['username']; 
     $api_userpwd  = $sms_info['api_pwd']; 
     $send_id = SMS_SEND_ID; 

     $curl = "http://bhashsms.com/api/sendmsg.php"; 
     $msg = getField('message', 'sms_template', '', '', array('type' => $sms_type, 'status' => 'Y'));
 
      foreach ($replace as $key => $value) { 
         $msg = str_replace($key, $value, $msg); 
      }     

      $message = urlencode($msg);
   
      $api_url = $curl . '?' .    "user=$api_username&pass=$api_userpwd&sender=$send_id&phone=$to&text=$message&priority=ndnd&stype=normal";
 
      $sms = curl_init($api_url); 
      ob_start(); 
      $ex = curl_exec($sms); 
      ob_end_clean(); 
      curl_close($sms); 
      return $ex; 
  }
}

//now call the function
send_text_message('X','xyz.x.com',array('a'=>'sss') );