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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 902 | function wp_get_nocache_headers() { |
| 903 | $headers = array( |
| 904 | 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT', |
| 905 | 'Last-Modified' => '', |
| 906 | 'Cache-Control' => 'no-cache, must-revalidate, max-age=0', |
| 907 | 'Pragma' => 'no-cache', |
| 908 | ); |
| 909 | |
| 910 | if ( function_exists('apply_filters') ) { |
| 911 | $headers = (array) apply_filters('nocache_headers', $headers); |
| 912 | } |
| 913 | return $headers; |
| 914 | } |
| 915 | |
| 916 | /** |
| 917 | * Sets the headers to prevent caching for the different browsers. |
| 918 | * |
| 919 | * Different browsers support different nocache headers, so several headers must |
| 920 | * be sent so that all of them get the point that no caching should occur. |