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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 |
---|---|
4 | * |
5 | * @package WordPress |
6 | */ |
7 | if ( wp_using_themes() ) { |
8 | /** |
9 | * Fires before determining which template to load. |
10 | * |
11 | * @since 1.5.0 |
12 | */ |
13 | do_action( 'template_redirect' ); |
14 | } |
15 |
|
16 | /** |
17 | * Filters whether to allow 'HEAD' requests to generate content. |
18 | * |
19 | * Provides a significant performance bump by exiting before the page |
20 | * content loads for 'HEAD' requests. See #14348. |
21 | * |
22 | * @since 3.5.0 |