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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 |
|---|---|
| 36 | */ |
| 37 | do_action( 'do_robots' ); |
| 38 | return; |
| 39 | } elseif ( is_favicon() ) { |
| 40 | /** |
| 41 | * Fired when the template loader determines a favicon.ico request. |
| 42 | * |
| 43 | * @since 5.4.0 |
| 44 | */ |
| 45 | do_action( 'do_favicon' ); |
| 46 | return; |
| 47 | } elseif ( is_feed() ) { |
| 48 | do_feed(); |
| 49 | return; |
| 50 | } elseif ( is_trackback() ) { |
| 51 | require ABSPATH . 'wp-trackback.php'; |
| 52 | return; |
| 53 | } |
| 54 | |