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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 |
|---|---|
| 8174 | |
| 8175 | /** |
| 8176 | * Filters the URL to the original attachment image. |
| 8177 | * |
| 8178 | * @since 5.3.0 |
| 8179 | * |
| 8180 | * @param string $original_image_url URL to original image. |
| 8181 | * @param int $attachment_id Attachment ID. |
| 8182 | */ |
| 8183 | return apply_filters( 'wp_get_original_image_url', $original_image_url, $attachment_id ); |
| 8184 | } |
| 8185 | |
| 8186 | /** |
| 8187 | * Filters callback which sets the status of an untrashed post to its previous status. |
| 8188 | * |
| 8189 | * This can be used as a callback on the `wp_untrash_post_status` filter. |
| 8190 | * |
| 8191 | * @since 5.6.0 |
| 8192 | * |