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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 |
|---|---|
| 1556 | */ |
| 1557 | function wp_doing_ajax() { |
| 1558 | /** |
| 1559 | * Filters whether the current request is a WordPress Ajax request. |
| 1560 | * |
| 1561 | * @since 4.7.0 |
| 1562 | * |
| 1563 | * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request. |
| 1564 | */ |
| 1565 | return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX ); |
| 1566 | } |
| 1567 | |
| 1568 | /** |
| 1569 | * Determines whether the current request should use themes. |
| 1570 | * |
| 1571 | * @since 5.1.0 |
| 1572 | * |
| 1573 | * @return bool True if themes should be used, false otherwise. |
| 1574 | */ |