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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 |
|---|---|
| 480 | * Fires for each custom column in the Media list table. |
| 481 | * |
| 482 | * Custom columns are registered using the 'manage_media_columns' filter. |
| 483 | * |
| 484 | * @since 2.5.0 |
| 485 | * |
| 486 | * @param string $column_name Name of the custom column. |
| 487 | * @param int $post_id Attachment ID. |
| 488 | */ |
| 489 | do_action( 'manage_media_custom_column', $column_name, $post->ID ); |
| 490 | ?></td> |
| 491 | <?php |
| 492 | break; |
| 493 | } |
| 494 | } |
| 495 | ?> |
| 496 | </tr> |
| 497 | <?php endwhile; |
| 498 | } |