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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 |
|---|---|
| 3155 | /** |
| 3156 | * Filters the URL to the includes directory. |
| 3157 | * |
| 3158 | * @since 2.8.0 |
| 3159 | * |
| 3160 | * @param string $url The complete URL to the includes directory including scheme and path. |
| 3161 | * @param string $path Path relative to the URL to the wp-includes directory. Blank string |
| 3162 | * if no path is specified. |
| 3163 | */ |
| 3164 | return apply_filters( 'includes_url', $url, $path ); |
| 3165 | } |
| 3166 | |
| 3167 | /** |
| 3168 | * Retrieves the URL to the content directory. |
| 3169 | * |
| 3170 | * @since 2.6.0 |
| 3171 | * |
| 3172 | * @param string $path Optional. Path relative to the content URL. Default empty. |
| 3173 | * @return string Content URL link with optional path appended. |