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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 |
|---|---|
| 1011 | * - `delete_comment_metadata_by_mid` |
| 1012 | * - `delete_term_metadata_by_mid` |
| 1013 | * - `delete_user_metadata_by_mid` |
| 1014 | * |
| 1015 | * @since 5.0.0 |
| 1016 | * |
| 1017 | * @param null|bool $delete Whether to allow metadata deletion of the given type. |
| 1018 | * @param int $meta_id Meta ID. |
| 1019 | */ |
| 1020 | $check = apply_filters( "delete_{$meta_type}_metadata_by_mid", null, $meta_id ); |
| 1021 | if ( null !== $check ) { |
| 1022 | return (bool) $check; |
| 1023 | } |
| 1024 | |
| 1025 | // Fetch the meta and go on if it's found. |
| 1026 | $meta = get_metadata_by_mid( $meta_type, $meta_id ); |
| 1027 | if ( $meta ) { |
| 1028 | $object_id = (int) $meta->{$column}; |
| 1029 | |