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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 |
|---|---|
| 164 | * Fires after a single attachment is created or updated via the REST API. |
| 165 | * |
| 166 | * @since 4.7.0 |
| 167 | * |
| 168 | * @param WP_Post $attachment Inserted or updated attachment |
| 169 | * object. |
| 170 | * @param WP_REST_Request $request The request sent to the API. |
| 171 | * @param bool $creating True when creating an attachment, false when updating. |
| 172 | */ |
| 173 | do_action( 'rest_insert_attachment', $attachment, $request, true ); |
| 174 | |
| 175 | // Include admin function to get access to wp_generate_attachment_metadata(). |
| 176 | require_once ABSPATH . 'wp-admin/includes/media.php'; |
| 177 | require_once ABSPATH . 'wp-admin/includes/image.php'; |
| 178 | |
| 179 | wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) ); |
| 180 | |
| 181 | if ( isset( $request['alt_text'] ) ) { |
| 182 | update_post_meta( $id, '_wp_attachment_image_alt', sanitize_text_field( $request['alt_text'] ) ); |