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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 |
|---|---|
| 4210 | } else { |
| 4211 | if ( $update ) { |
| 4212 | /** |
| 4213 | * Fires once an existing attachment has been updated. |
| 4214 | * |
| 4215 | * @since 2.0.0 |
| 4216 | * |
| 4217 | * @param int $post_ID Attachment ID. |
| 4218 | */ |
| 4219 | do_action( 'edit_attachment', $post_ID ); |
| 4220 | |
| 4221 | $post_after = get_post( $post_ID ); |
| 4222 | |
| 4223 | /** |
| 4224 | * Fires once an existing attachment has been updated. |
| 4225 | * |
| 4226 | * @since 4.4.0 |
| 4227 | * |
| 4228 | * @param int $post_ID Post ID. |