Using the instanceof Operator : instanceof « Language Basics « PHP

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PHP » Language Basics » instanceof 
Using the instanceof Operator
 
<?php
     class Math {
          public function add($op1, $op2) {
               if(($op1 instanceof Float&& ($op2 instanceof Float)) {
                    return $op1->getFloat() + $op2->getFloat();
               else {
                    echo "Must pass two Floats!\n";
               }
          }
     }
?>
  
  
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1.Difference between instanceof and is_subclass_of( )
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