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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 |
|---|---|
| 133 | * |
| 134 | * @since 2.2.0 |
| 135 | * @since 4.4.0 The `$sep` parameter was deprecated and renamed to `$deprecated`. |
| 136 | * |
| 137 | * @see get_wp_title_rss() |
| 138 | * |
| 139 | * @param string $wp_title_rss The current blog title. |
| 140 | * @param string $deprecated Unused. |
| 141 | */ |
| 142 | echo apply_filters( 'wp_title_rss', get_wp_title_rss(), $deprecated ); |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Retrieve the current post title for the feed. |
| 147 | * |
| 148 | * @since 2.0.0 |
| 149 | * |
| 150 | * @return string Current post title. |
| 151 | */ |