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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 |
|---|---|
| 173 | |
| 174 | /** |
| 175 | * Allows replacement of the editor. |
| 176 | * |
| 177 | * @since 4.9.0 |
| 178 | * |
| 179 | * @param bool $replace Whether to replace the editor. Default false. |
| 180 | * @param WP_Post $post Post object. |
| 181 | */ |
| 182 | if ( true === apply_filters( 'replace_editor', false, $post ) ) { |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | if ( use_block_editor_for_post( $post ) ) { |
| 187 | require ABSPATH . 'wp-admin/edit-form-blocks.php'; |
| 188 | break; |
| 189 | } |
| 190 | |
| 191 | if ( ! wp_check_post_lock( $post->ID ) ) { |