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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 |
|---|---|
| 493 | * |
| 494 | * Custom columns are registered using the 'manage_media_columns' filter. |
| 495 | * |
| 496 | * @since 2.5.0 |
| 497 | * |
| 498 | * @param string $column_name Name of the custom column. |
| 499 | * @param int $post_id Attachment ID. |
| 500 | */ |
| 501 | ?> |
| 502 | <?php do_action( 'manage_media_custom_column', $column_name, $post->ID ); ?> |
| 503 | </td> |
| 504 | <?php |
| 505 | break; |
| 506 | } |
| 507 | } |
| 508 | ?> |
| 509 | </tr> |
| 510 | <?php endwhile; |
| 511 | } |