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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 |
|---|---|
| 407 | * |
| 408 | * Custom columns are registered using the 'manage_media_columns' filter. |
| 409 | * |
| 410 | * @since 2.5.0 |
| 411 | * |
| 412 | * @param string $column_name Name of the custom column. |
| 413 | * @param int $post_id Attachment ID. |
| 414 | */ |
| 415 | ?> |
| 416 | <?php do_action( 'manage_media_custom_column', $column_name, $post->ID ); ?> |
| 417 | </td> |
| 418 | <?php |
| 419 | break; |
| 420 | } |
| 421 | } |
| 422 | ?> |
| 423 | </tr> |
| 424 | <?php endwhile; |
| 425 | } |