yii\i18n\Formatter::asParagraphs PHP Метод

    public function asParagraphs($value)
    {
        if ($value === null) {
            return $this->nullDisplay;
        }
        return str_replace('<p></p>', '', '<p>' . preg_replace('/\\R{2,}/u', "</p>\n<p>", Html::encode($value)) . '</p>');
    }

 public function testAsParagraphs()
 {
     $value = '123';
     $this->assertSame("<p>{$value}</p>", $this->formatter->asParagraphs($value));
     $value = 123;
     $this->assertSame("<p>{$value}</p>", $this->formatter->asParagraphs($value));
     $value = '<>';
     $this->assertSame('<p>&lt;&gt;</p>', $this->formatter->asParagraphs($value));
     $value = "123\n456";
     $this->assertSame("<p>123\n456</p>", $this->formatter->asParagraphs($value));
     $value = "123\n\n456";
     $this->assertSame("<p>123</p>\n<p>456</p>", $this->formatter->asParagraphs($value));
     $value = "123\n\n\n456";
     $this->assertSame("<p>123</p>\n<p>456</p>", $this->formatter->asParagraphs($value));
     $value = "123\r\n456";
     $this->assertSame("<p>123\r\n456</p>", $this->formatter->asParagraphs($value));
     $value = "123\r\n\r\n456";
     $this->assertSame("<p>123</p>\n<p>456</p>", $this->formatter->asParagraphs($value));
     $value = "123\r\n\r\n\r\n456";
     $this->assertSame("<p>123</p>\n<p>456</p>", $this->formatter->asParagraphs($value));
     $value = "123\r456";
     $this->assertSame("<p>123\r456</p>", $this->formatter->asParagraphs($value));
     $value = "123\r\r456";
     $this->assertSame("<p>123</p>\n<p>456</p>", $this->formatter->asParagraphs($value));
     $value = "123\r\r\r456";
     $this->assertSame("<p>123</p>\n<p>456</p>", $this->formatter->asParagraphs($value));
     // null display
     $this->assertSame($this->formatter->nullDisplay, $this->formatter->asParagraphs(null));
 }