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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 |
|---|---|
| 4161 | } else { |
| 4162 | if ( $update ) { |
| 4163 | /** |
| 4164 | * Fires once an existing attachment has been updated. |
| 4165 | * |
| 4166 | * @since 2.0.0 |
| 4167 | * |
| 4168 | * @param int $post_ID Attachment ID. |
| 4169 | */ |
| 4170 | do_action( 'edit_attachment', $post_ID ); |
| 4171 | |
| 4172 | $post_after = get_post( $post_ID ); |
| 4173 | |
| 4174 | /** |
| 4175 | * Fires once an existing attachment has been updated. |
| 4176 | * |
| 4177 | * @since 4.4.0 |
| 4178 | * |
| 4179 | * @param int $post_ID Post ID. |