/**
* Validates Accept-Language Header Field in according to RFC 2616 Section 14.3
*
* <p><strong>RFC Specification</strong></p>
*
* <code>
* Accept-Language = "Accept-Language" ":"
* 1#( language-range [ ";" "q" "=" qvalue ] )
*
* language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) | "*" )
* </code>
*
* @param string $data
* Data to validate
*
* @return boolean
* TRUE if valid and FALSE otherwise
*
* @link
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
* RFC 2616 Section 14.4
*/
public function validate($data)
{
preg_match(sprintf('@^(?<abbr>[a-zA-Z]{2})(?:-(?<country>[a-zA-Z]{2}))?(?:;q=(?<quality>%s))?$@x', self::FLOAT), $data, $match);
if (count($match) != 0) {
/**
* @internal
* General Format is correct
* Let's check chosen Language Abbreviation against ISO 639 Standards
*/
$ISO = new ISO639();
if ($ISO->validate($match['abbr'])) {
/**
* @internal
* Language Abbreviation is Valid
* Let's check chosen Country Code, if present, against ISO 3166 Standards
*/
if (isset($match['country'])) {
$ISO = new ISO3166();
if ($ISO->validate($match['country'])) {
return TRUE;
}
}
// Valid, but without Country Code
return TRUE;
}
// Invalid Language Abbreviation
return FALSE;
}
// Invalid everything xD
return FALSE;
}
/**
* Validates Content-Language Header Field in according to RFC 2616 Section 14.12
*
* <p><strong>RFC Specification</strong></p>
*
* <code>
* Content-Language = "Content-Language" ":" 1#language-tag
* </code>
*
* @param string $data
* Data to validate
*
* @return boolean
* TRUE if valid and FALSE otherwise
*
* @link
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.12
* RFC 2616 Section 14.12
*/
public function validate($data)
{
/**
* @internal
* The rules are the same of Accept-Language, but here Quality Values
* are not considerated
*/
preg_match('@^(?<abbr>[a-zA-Z]{2})(?:-(?<country>[a-zA-Z]{2}))?$@', $data, $match);
if (count($match) != 0) {
/**
* @internal
* General Format is correct
* Let's check chosen Language Abbreviation against ISO 639 Standards
*/
$ISO = new ISO639();
if ($ISO->validate($match['abbr'])) {
/**
* @internal
* Language Abbreviation is Valid
* Let's check chosen Country Code, if present, against ISO 3166 Standards
*/
if (isset($match['country'])) {
$ISO = new ISO3166();
if ($ISO->validate($match['country'])) {
return TRUE;
}
}
// Valid, but without Country Code
return TRUE;
}
// Invalid Language Abbreviation
return FALSE;
}
// Invalid everything xD
return FALSE;
}