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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 |
|---|---|
| 3181 | /** |
| 3182 | * Filters the URL to the content directory. |
| 3183 | * |
| 3184 | * @since 2.8.0 |
| 3185 | * |
| 3186 | * @param string $url The complete URL to the content directory including scheme and path. |
| 3187 | * @param string $path Path relative to the URL to the content directory. Blank string |
| 3188 | * if no path is specified. |
| 3189 | */ |
| 3190 | return apply_filters( 'content_url', $url, $path); |
| 3191 | } |
| 3192 | |
| 3193 | /** |
| 3194 | * Retrieves a URL within the plugins or mu-plugins directory. |
| 3195 | * |
| 3196 | * Defaults to the plugins directory URL if no arguments are supplied. |
| 3197 | * |
| 3198 | * @since 2.6.0 |
| 3199 | * |