mysql - how to post contact no. to sql database using php -


i want store user's contact no. android registration form in sql database shows 'failure' instead of 'success' when try add $_post['contact'] code php file. php file.

register.php

<?php  define('host','mysql8.000webhost.com');  define('user','a6293046_******');  define('pass','*********');  define('db','a6293046_insti');  $con = mysqli_connect(host,user,pass,db);   $name = $_post['name'];  $email = $_post['email'];  $address = $_post['address'];  $contact =(int)$_post['contact'];  $institute = $_post['institute'];    $sql = "insert persons (name,email,address,contact-no,institute)      values ('$name','$email','$address','contact-no','$institute')";  if(mysqli_query($con,$sql)){  echo 'success';  }  else{  echo 'failure';  }  mysqli_close($con);  ?> 

please tell me doing wrong in it. thank you

    <?php      define('host','mysql8.000webhost.com');      define('user','a6293046_******');      define('pass','*********');      define('db','a6293046_insti');      $con = mysqli_connect(host,user,pass,db);       $name = $_post['name'];      $email = $_post['email'];      $address = $_post['address'];      $contact =$_post['contact'];      $institute = $_post['institute'];        $sql = "insert persons (name,email,address,contact-no,institute)      values ('$name','$email','$address',$contact,'$institute')";      $result=$con->query($sql); if($result)  {      echo 'success';      }      else{      echo 'failure';      }      $con->close();      ?>    remove int $post_['contact'] , dnt use single quotes('') $contact while inserting since integer string value should give single quotes 

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