What does === do in PHP

Question

I have been programming in PHP for a while but I still dont understand the difference between == and ===. I know that = is assignment. And == is equals to. So what is the pu

Answer 1

It's a true equality comparison.

"" == False for instance is true.

"" === False is false

Answer 2

It is true that === compares both value and type, but there is one case which hasn't been mentioned yet and that is when you compare objects with == and ===.

Given the following code:

class TestClass {
  public $value;

  public function __construct($value) {
    $this->value = $value;
  }
}

$a = new TestClass("a");
$b = new TestClass("a");

var_dump($a == $b);  // true
var_dump($a === $b); // false

In case of objects === compares reference, not type and value (as $a and $b are of both equal type and value).