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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 |
---|---|
4392 | } else { |
4393 |
|
4394 | /** |
4395 | * Fires once an attachment has been added. |
4396 | * |
4397 | * @since 2.0.0 |
4398 | * |
4399 | * @param int $post_ID Attachment ID. |
4400 | */ |
4401 | do_action( 'add_attachment', $post_ID ); |
4402 | } |
4403 |
|
4404 | return $post_ID; |
4405 | } |
4406 |
|
4407 | if ( $update ) { |
4408 | /** |
4409 | * Fires once an existing post has been updated. |
4410 | * |