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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 |
|---|---|
| 2616 | /** |
| 2617 | * Filter the URL to the content directory. |
| 2618 | * |
| 2619 | * @since 2.8.0 |
| 2620 | * |
| 2621 | * @param string $url The complete URL to the content directory including scheme and path. |
| 2622 | * @param string $path Path relative to the URL to the content directory. Blank string |
| 2623 | * if no path is specified. |
| 2624 | */ |
| 2625 | return apply_filters( 'content_url', $url, $path); |
| 2626 | } |
| 2627 | |
| 2628 | /** |
| 2629 | * Retrieve a URL within the plugins or mu-plugins directory. |
| 2630 | * |
| 2631 | * Defaults to the plugins directory URL if no arguments are supplied. |
| 2632 | * |
| 2633 | * @since 2.6.0 |
| 2634 | * |