Ergo\Http\HeaderCollection::value PHP Метод

    function value($name, $default = false)
    {
        $values = $this->values($name);
        return count($values) ? $values[0] : $default;
    }

 public function testSimpleUsage()
 {
     $collection = new Http\HeaderCollection();
     $collection->add('Content-Length: 9');
     $this->assertEquals($collection->values('Content-Length'), array('9'));
     $this->assertEquals($collection->value('Content-Length'), '9');
     $this->assertEquals($collection->toArray(false), array('Content-Length: 9'));
 }