Find out duplicate entry from a form fields-Validation of duplicate entry in a form | Learning Curve- Perfect Tutorial for the beginers

<?php

				 $name                                     = 'vasanthan';
                 $email                                    = '';
				 $name_2                                   = '';
                 $email_2                                  = 'mydoubts.in@gmail.com';
				 $name_3                                   = '';
                 $email_3                                  = '';
				 $name_4                                   = 'vasanthan';
                 $email_4                                  = 'mydoubts.in@gmail.com';
				 
				 $name_array=array();
				 $email_array=array();
				 if($name!='')
						  {
						  $name_array[]=$name;
						  }
					if($name_2!='')
						  {
						  $name_array[]=$name_2;
						  }	  
					if($name_3!='')
						  {
						  $name_array[]=$name_3;
						  }	  
					if($name_4!='')
						  {
						  $name_array[]=$name_4;
						  }	  						  
 
 
					if($email!='')
						  {
						  $email_array[]=$email;
						  }
					if($email_2!='')
						  {
						  $email_array[]=$email_2;
						  }	  
					if($email_3!='')
						  {
						  $email_array[]=$email_3;
						  }	  
					if($email_4!='')
						  {
						  $email_array[]=$email_4;
						  }	  			
 
				 
				 echo "<pre>";
print_r($name_array);

				 
				 echo "<pre>";
print_r($email_array);

if (count(array_unique($name_array)) < count($name_array))

{
 echo 'Duplicate entry found  Name';

}
echo "<pre>";
if (count(array_unique($email_array)) < count($email_array))

{
 echo 'Duplicate entry found Email id';

}

?>

<?php

$name = 'vasanthan';

$email = '';

$name_2 = '';

$email_2 = 'mydoubts.in@gmail.com';

$name_3 = '';

$email_3 = '';

$name_4 = 'vasanthan';

$email_4 = 'mydoubts.in@gmail.com';

$name_array=array();

$email_array=array();

if($name!='')

{

$name_array[]=$name;

}

if($name_2!='')

{

$name_array[]=$name_2;

}

if($name_3!='')

{

$name_array[]=$name_3;

}

if($name_4!='')

{

$name_array[]=$name_4;

}

if($email!='')

{

$email_array[]=$email;

}

if($email_2!='')

{

$email_array[]=$email_2;

}

if($email_3!='')

{

$email_array[]=$email_3;

}

if($email_4!='')

{

$email_array[]=$email_4;

}

echo "<pre>";

print_r($name_array);

echo "<pre>";

print_r($email_array);

if (count(array_unique($name_array)) < count($name_array))

{

echo 'Duplicate entry found Name';

}

echo "<pre>";

if (count(array_unique($email_array)) < count($email_array))

{

echo 'Duplicate entry found Email id';

}