Difference between assertEquals and assertSame in PHPUnit?

Question

PHPUnit contains an assertEquals() method, but it also has an assertSame() one. At first glance it looks like they do the same thing.

What is the difference between the t

Answer 1

Moreover,

// Passes
$this->assertSame("123.", "123.");
$this->assertEquals("123.", "123");
// Fails
$this->assertSame("123.", "123");