Phly\Http\HeaderSecurity::assertValidName PHP Метод

    public static function assertValidName($name)
    {
        if (!preg_match('/^[a-zA-Z0-9\'`#$%&*+.^_|~!-]+$/', $name)) {
            throw new InvalidArgumentException('Invalid header name');
        }
    }

 /**
  * Return an instance with the specified header appended with the
  * given value.
  *
  * Existing values for the specified header will be maintained. The new
  * value(s) will be appended to the existing list. If the header did not
  * exist previously, it will be added.
  *
  * This method MUST be implemented in such a way as to retain the
  * immutability of the message, and MUST return an instance that has the
  * new header and/or value.
  *
  * @param string $name Case-insensitive header field name to add.
  * @param string|string[] $value Header value(s).
  * @return self
  * @throws \InvalidArgumentException for invalid header names or values.
  */
 public function withAddedHeader($header, $value)
 {
     if (is_string($value)) {
         $value = [$value];
     }
     if (!is_array($value) || !$this->arrayContainsOnlyStrings($value)) {
         throw new InvalidArgumentException('Invalid header value; must be a string or array of strings');
     }
     HeaderSecurity::assertValidName($header);
     self::assertValidHeaderValue($value);
     if (!$this->hasHeader($header)) {
         return $this->withHeader($header, $value);
     }
     $normalized = strtolower($header);
     $header = $this->headerNames[$normalized];
     $new = clone $this;
     $new->headers[$header] = array_merge($this->headers[$header], $value);
     return $new;
 }