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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 |
|---|---|
| 1744 | */ |
| 1745 | function wp_doing_ajax() { |
| 1746 | /** |
| 1747 | * Filters whether the current request is a WordPress Ajax request. |
| 1748 | * |
| 1749 | * @since 4.7.0 |
| 1750 | * |
| 1751 | * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request. |
| 1752 | */ |
| 1753 | return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX ); |
| 1754 | } |
| 1755 | |
| 1756 | /** |
| 1757 | * Determines whether the current request should use themes. |
| 1758 | * |
| 1759 | * @since 5.1.0 |
| 1760 | * |
| 1761 | * @return bool True if themes should be used, false otherwise. |
| 1762 | */ |