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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 |
|---|---|
| 1705 | */ |
| 1706 | function wp_doing_ajax() { |
| 1707 | /** |
| 1708 | * Filters whether the current request is a WordPress Ajax request. |
| 1709 | * |
| 1710 | * @since 4.7.0 |
| 1711 | * |
| 1712 | * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request. |
| 1713 | */ |
| 1714 | return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX ); |
| 1715 | } |
| 1716 | |
| 1717 | /** |
| 1718 | * Determines whether the current request should use themes. |
| 1719 | * |
| 1720 | * @since 5.1.0 |
| 1721 | * |
| 1722 | * @return bool True if themes should be used, false otherwise. |
| 1723 | */ |