Changeset 10619 for trunk/wp-includes/functions.php

Timestamp:

02/21/2009 09:39:06 PM (16 years ago)

Author:

westi

Message:

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

File:

• trunk/wp-includes/functions.php (modified) (2 diffs)

trunk/wp-includes/functions.php

@@ -1461 +1461 @@
 
 /**
+ * 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.
  *
@@ -1467 +1488 @@
  *
  * @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}");     
 }