Header

This class offers a range of ready-made headers.

• Instantiation
• Content_Type
• Content_Length
• Content_Disposition_Attachment
• Content_Type_application_download
• Content_Type_application_force_download
• Content_Type_application_octet_stream
• Content_Description_File_Transfer
• Access_Control_Allow_Origin
• Cache_Control
• Location
• Expires
• Etag
• Last_Modified
• Set_Cookie
• Refresh
• WWW_Authenticate
• Retry_After
• ContentSecurityPolicy
• X_Accel_Buffering
• Examples
  • Provide a file for download

Instantiation

Header::init();

almost all methods are fluent, which allows you to combine the methods; see Examples

Content_Type

public function Content_Type(string $sType = '') : Header

Header::init()->Content_Type(\MVC\Media\Type_Application_json::DESCRIPTION);

alternatively, you can also send the Content_Type header via a media type class \MVC\Media\Type*

\MVC\Media\Type_Application_json::header();

Content_Length

public function Content_Length(int $iFilesize = 0) : Header

Header::init()->Content_Length(12345);

Content_Disposition_Attachment

public function Content_Disposition_Attachment(string $sFilename = '') : Header

Header::init()->Content_Disposition_Attachment('Document.md');

Content_Type_application_download

public function Content_Type_application_download() : Header

Header::init()->Content_Type_application_download();

Content_Type_application_force_download

public function Content_Type_application_force_download() : Header

Header::init()->Content_Type_application_force_download();

Content_Type_application_octet_stream

public function Content_Type_application_octet_stream() : Header

Header::init()->Content_Type_application_octet_stream();

Content_Description_File_Transfer

public function Content_Description_File_Transfer() : Header

Header::init()->Content_Description_File_Transfer();

Access_Control_Allow_Origin

public function Access_Control_Allow_Origin(string $sOrigin = '*') : Header

Header::init()->Access_Control_Allow_Origin(null);

see developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin

Cache_Control

public function Cache_Control(EnumHttpHeaderCacheControl | array $mEnumCacheControl) : Header

Header::init()->Cache_Control(\MVC\Enum\EnumCacheControl::NoCache);

Header::init()->Cache_Control(array(
    \MVC\Enum\EnumCacheControl::NoCache, 
    \MVC\Enum\EnumCacheControl::MustRevalidate)
);

Location

public function Location(string $sLocation = '', bool $bReplace = true, int $iResponseCode = 302, bool $bExit = true) : void

Header::init()->Location('/404/');

Expires

public function Expires(int $iExpireSeconds = 0) : Header

Header::init()->Expires(iExpireSeconds: (60 * 60 * 24)); # +1 day (future)

Header::init()->Expires(iExpireSeconds: -(60 * 60 * 24)); # -1 day (past)

Etag

Entity Tag

public function Etag(string $sEtag = '""') : Header

Header::init()->Etag('"xyzzy"');

see datatracker.ietf.org/doc/html/rfc7232#section-2.3

Last_Modified

public function Last_Modified(int $iUnixTimestamp = 0) : Header

Header::init()->Last_Modified(
    new \DateTime("1 day ago")->getTimestamp()
);

Set_Cookie

public function Set_Cookie(string $sName, string $sValue, int $iExpireUnixTimestamp = 0, string $sPath = '/', string $sDomain = '', string $sSameSite = '', bool $bSecure = false, bool $bHttpOnly = false) : Header

Header::init()->Set_Cookie(
    sName: 'Name',
    sValue: 'value',
    iExpireUnixTimestamp: new \DateTime("+ 1 day")->getTimestamp(),
    sPath: '/',
    sSameSite: 'None; Partitioned',
    bSecure: true,
    bHttpOnly: true
);

Refresh

public function Refresh(int $iRefreshSeconds = 0, string $sUrl = '') : void

Header::init()->Refresh(
    iRefreshSeconds: 3,
    sUrl: '/'
);

WWW_Authenticate

Only the "Basic" authentication method is supported. See the header() function for more information (see www.php.net/manual/de/function.header.php.

user and password are stored in

• $_SERVER['PHP_AUTH_USER']
• $_SERVER['PHP_AUTH_PW'].

Be aware this is state-less.

And you must manage any check of PHP_AUTH_USER and PHP_AUTH_PW yourself.
see www.php.net/manual/en/features.http-auth.php

public function WWW_Authenticate(string $sBasicRealm = 'Authentication', string $sUrlAuthFails = '')

Header::init()->WWW_Authenticate(
    sBasicRealm: 'My Realm',
    sUrlAuthFails: '/403/'
);

Retry_After

public function Retry_After(int $iValue = 0, EnumHttpHeaderRetryAfter $eEnumRetryAfter = EnumHttpHeaderRetryAfter::UnixTimestamp) : Header

Header::init()->Retry_After(
    iValue: 300,
    eEnumRetryAfter: \MVC\Enum\EnumHttpHeaderRetryAfter::RetryAfterSeconds
);

ContentSecurityPolicy

sets CSP ("Content Security Policy") HTTP Header.

public function ContentSecurityPolicy(array $aCSP = array()) : Header

Header::init()->ContentSecurityPolicy();

• if Argument aCSP is empty, the method tries to read the configuration array from Config::MODULE()['CSP'].

For more Information about Content Security Policy see content-security-policy.com

X_Accel_Buffering

public function X_Accel_Buffering(string $sStatus = 'no') : Header

Header::init()->X_Accel_Buffering();
Header::init()->X_Accel_Buffering(sStatus: 'no');

Examples

Provide a file for download

Header::init()
    ->Content_Disposition_Attachment('robots.txt')
    ->Content_Type_application_force_download()
    ->Content_Type_application_octet_stream()
    ->Content_Type_application_download()
    ->Content_Description_File_Transfer()
    ->Content_Length(filesize('/var/www/html/public/robots.txt'))
;
echo file_get_contents('/var/www/html/public/robots.txt');