Check for multiple null isset values

Question

I am checking if two values are null. If both are null I want to return false, if either or both are not null, I want to return true.

My current code returns true only when both are not null but I want it to return true when either or not null.

// check if both null
   if (!isset($myarray['dataone'], $myarray['datatwo']))
       {
           echo 'false';
        );    
       } else {
           echo 'true';
        );
       }
       return $emptytabs;

Answer 1

For that you can use relational operators. AND (&&) OR (||)

By using AND (&&) operators.

if ( (!isset($myarray['dataone']) || (!isset$myarray['datatwo'] ))
{
    echo 'false';  
} 
else 
{
    echo 'true';
}

By using OR ( || ) operators.

if (isset($myarray['dataone'] && isset$myarray['datatwo'])
{
    echo 'false';  
} 
else 
{
    echo 'true';
}