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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 |
---|---|
4112 | if ( $file ) |
4113 | update_attached_file( $post_ID, $file ); |
4114 |
|
4115 | clean_post_cache( $post_ID ); |
4116 |
|
4117 | if ( ! empty( $context ) ) |
4118 | add_post_meta( $post_ID, '_wp_attachment_context', $context, true ); |
4119 |
|
4120 | if ( $update) { |
4121 | do_action('edit_attachment', $post_ID); |
4122 | } else { |
4123 | do_action('add_attachment', $post_ID); |
4124 | } |
4125 |
|
4126 | return $post_ID; |
4127 | } |
4128 |
|
4129 | /** |
4130 | * Trashes or deletes an attachment. |