PHP WTF of the day

1_Person.class.php

<?php
class Person
{
  private $phone;
  private $name;

  public function __construct($name, $phone)
  {
      var_dump($name);
      var_dump($phone);

      $this->name = $name;
      $this->phone = $phone;
  }
}

2_example.php

<?php
echo 'Normal person:'.PHP_EOL;
$john = new Person('John', '544-555-3598'); // No problems

echo 'Phoneless person:'.PHP_EOL;
$john = new Person('John'); // Doesn't throw an Exception, only an E_warning, and *KEEP RUNNING*

3_output.txt

Normal person:
string(4) "John"
string(12) "544-555-3598"

Warning: Missing argument 2 for Person::__construct(), called in (...)/example.php on line 6 and defined in (...)/Person.class.php on line 7

Phoneless person:
string(4) "John"
NULL