Online PHP editor | output for JFvt7

<?php class MyClass { public $prop1 = "I'm a class property!"; public function setProperty($newval) { $this->prop1 = $newval; } public function getProperty() { return $this->prop1 . " "; } } $obj = new MyClass;// Class instantiation. //var_dump($obj); echo "1st drill:"." "; echo $obj->getProperty(); //echo prop1 string (// Get the property value). $obj->setProperty('I am a new property value'." "); echo $obj->getProperty(); // Read it out again to show the change. //Second Drill echo "second drill: "." "; class class2 { public $obj2="I am the first variable from the second drill."; public function setProperty2($newval2) { $this->obj2=$newval2; } public function getProperty2() { return $this->obj2." "; } } // Create new object. $obj2 = new class2; // Get the value of $prop1 from both objects echo $obj->getProperty(); //taken from first drill. echo $obj2->getProperty2($obj2); // Set new values for both objects $obj->setProperty("I'm a new property value!"); $obj2->setProperty2("I belong to the second instance!"." "); // Output both objects' $prop1 value echo $obj->getProperty(); echo $obj2->getProperty2(); //This is where I am having an error.