为什么PHP的filter_var无法识别电子邮件地址？

Question

I am starting with PHP and wrote a unit tests to see if I get things right.

<?php
use PHPUnit\Framework\TestCase;

class MyTest extends TestCase {
    public function testEmailWtf() {
        $this->assertTrue(filter_var("[e-mail]", FILTER_VALIDATE_EMAIL));
    }
}
?>

This fails, but I don't understand why.

1) MyTest::testEmailWtf

Failed asserting that '[e-mail]' is true.

Why does this not accept a valid email address?

Answer 1

According to http://php.net/manual/en/function.filter-var.php, filter_var will return FALSE if something is wrong, or return your string if everything's ok.

So I believe you should change your test with assertEquals :

<?php
$emailToValidate = "[e-mail]";
$this->assertEquals($emailToValidate , filter_var($emailToValidate, FILTER_VALIDATE_EMAIL));
?>