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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 |
---|---|
7718 |
|
7719 | /** |
7720 | * Filters the URL to the original attachment image. |
7721 | * |
7722 | * @since 5.3.0 |
7723 | * |
7724 | * @param string $original_image_url URL to original image. |
7725 | * @param int $attachment_id Attachment ID. |
7726 | */ |
7727 | return apply_filters( 'wp_get_original_image_url', $original_image_url, $attachment_id ); |
7728 | } |
7729 |
|
7730 | /** |
7731 | * Filter callback which sets the status of an untrashed post to its previous status. |
7732 | * |
7733 | * This can be used as a callback on the `wp_untrash_post_status` filter. |
7734 | * |
7735 | * @since 5.6.0 |
7736 | * |