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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 |
---|---|
1415 | * @see wp_get_nocache_headers() |
1416 | * |
1417 | * @param array $headers { |
1418 | * Header names and field values. |
1419 | * |
1420 | * @type string $Expires Expires header. |
1421 | * @type string $Cache-Control Cache-Control header. |
1422 | * } |
1423 | */ |
1424 | $headers = (array) apply_filters( 'nocache_headers', $headers ); |
1425 | } |
1426 | $headers['Last-Modified'] = false; |
1427 | return $headers; |
1428 | } |
1429 |
|
1430 | /** |
1431 | * Set the headers to prevent caching for the different browsers. |
1432 | * |
1433 | * Different browsers support different nocache headers, so several |