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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 |
|---|---|
| 4369 | } else { |
| 4370 | if ( $update ) { |
| 4371 | /** |
| 4372 | * Fires once an existing attachment has been updated. |
| 4373 | * |
| 4374 | * @since 2.0.0 |
| 4375 | * |
| 4376 | * @param int $post_ID Attachment ID. |
| 4377 | */ |
| 4378 | do_action( 'edit_attachment', $post_ID ); |
| 4379 | |
| 4380 | $post_after = get_post( $post_ID ); |
| 4381 | |
| 4382 | /** |
| 4383 | * Fires once an existing attachment has been updated. |
| 4384 | * |
| 4385 | * @since 4.4.0 |
| 4386 | * |
| 4387 | * @param int $post_ID Post ID. |