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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 |
|---|---|
| 34 | $args = wp_parse_args( $args, $defaults ); |
| 35 | |
| 36 | /** |
| 37 | * Fires at the beginning of an export, before any headers are sent. |
| 38 | * |
| 39 | * @since 2.3.0 |
| 40 | * |
| 41 | * @param array $args An array of export arguments. |
| 42 | */ |
| 43 | do_action( 'export_wp', $args ); |
| 44 | |
| 45 | $sitename = sanitize_key( get_bloginfo( 'name' ) ); |
| 46 | if ( ! empty( $sitename ) ) { |
| 47 | $sitename .= '.'; |
| 48 | } |
| 49 | $date = date( 'Y-m-d' ); |
| 50 | $wp_filename = $sitename . 'wordpress.' . $date . '.xml'; |
| 51 | /** |
| 52 | * Filter the export filename. |