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<?php

namespace Laminas\Http\Header;

/**
 * Interface for HTTP Header classes.
 */
interface HeaderInterface
{
    /**
     * Factory to generate a header object from a string
     *
     * @see http://tools.ietf.org/html/rfc2616#section-4.2
     *
     * @param string $headerLine
     * @return static
     * @throws Exception\InvalidArgumentException If the header does not match RFC 2616 definition.
     */
    public static function fromString($headerLine);

    /**
     * Retrieve header name
     *
     * @return string
     */
    public function getFieldName();

    /**
     * Retrieve header value
     *
     * @return string
     */
    public function getFieldValue();

    /**
     * Cast to string
     *
     * Returns in form of "NAME: VALUE"
     *
     * @return string
     */
    public function toString();
}