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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 |
|---|---|
| 137 | * |
| 138 | * The filter is only applied on the front end. |
| 139 | * |
| 140 | * @since 2.8.0 |
| 141 | * |
| 142 | * @param string $prepend Text displayed before the post title. |
| 143 | * Default 'Private: %s'. |
| 144 | * @param WP_Post $post Current post object. |
| 145 | */ |
| 146 | $private_title_format = apply_filters( 'private_title_format', __( 'Private: %s' ), $post ); |
| 147 | $title = sprintf( $private_title_format, $title ); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Filter the post title. |
| 153 | * |
| 154 | * @since 0.71 |
| 155 | * |