<?php

$user= $_POST['usr'];
$pass= $_POST['pass'];
$email= $_POST['eml'];
$id= $_POST['mid'];
global $wpdb;
$subs = array('Username' => $user ,'Password' => $pass);
$johnny=array( ‘ID’ => 15 ) ;
$table_name='patient_info';
$result=$wpdb->update($table_name, $subs, $johnny);
//$result=mysqli_query($update_price);
 if($result)
 {
     echo "query working";
 }
 else
 {
     echo "query not working";
 }

?>