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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 |
|---|---|
| 2811 | /** |
| 2812 | * Filter the admin area URL. |
| 2813 | * |
| 2814 | * @since 2.8.0 |
| 2815 | * |
| 2816 | * @param string $url The complete admin area URL including scheme and path. |
| 2817 | * @param string $path Path relative to the admin area URL. Blank string if no path is specified. |
| 2818 | * @param int|null $blog_id Blog ID, or null for the current blog. |
| 2819 | */ |
| 2820 | return apply_filters( 'admin_url', $url, $path, $blog_id ); |
| 2821 | } |
| 2822 | |
| 2823 | /** |
| 2824 | * Retrieve the url to the includes directory. |
| 2825 | * |
| 2826 | * @since 2.6.0 |
| 2827 | * |
| 2828 | * @param string $path Optional. Path relative to the includes url. |
| 2829 | * @param string $scheme Optional. Scheme to give the includes url context. |