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Allow for the HTTP headers returned by WordPress to be filtered by a plugin. Fixes #9205 props filosofo.

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git-svn-id: https://develop.svn.wordpress.org/trunk@10619 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Peter Westwood
2009-02-21 21:39:06 +00:00
parent cc6baace8f
commit 271e0f7742
2 changed files with 43 additions and 15 deletions
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30
wp-includes/functions.php
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@@ -1459,6 +1459,27 @@ function status_header( $header ) {
return @header( $status_header, true, $header );
}
/**
* Gets the header information to prevent caching.
*
* The several different headers cover the different ways cache prevention is handled
* by different browsers
*
* @since 2.8
*
* @uses apply_filters()
* @return array The associative array of header names and field values.
*/
function wp_get_nocache_headers() {
$headers = array(
'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
'Last-Modified' => gmdate( 'D, d M Y H:i:s' ) . ' GMT',
'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
'Pragma' => 'no-cache',
);
return apply_filters('nocache_headers', $headers);
}
/**
* Sets the headers to prevent caching for the different browsers.
*
@@ -1466,13 +1487,12 @@ function status_header( $header ) {
* be sent so that all of them get the point that no caching should occur.
*
* @since 2.0.0
* @uses wp_get_nocache_headers()
*/
function nocache_headers() {
// why are these @-silenced when other header calls aren't?
@header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
@header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' );
@header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
@header( 'Pragma: no-cache' );
$headers = wp_get_nocache_headers();
foreach( (array) $headers as $name => $field_value )
@header("{$name}: {$field_value}");
}
/**