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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 |
|---|---|
| 1548 | */ |
| 1549 | function wp_using_themes() { |
| 1550 | /** |
| 1551 | * Filters whether the current request should use themes. |
| 1552 | * |
| 1553 | * @since 5.1.0 |
| 1554 | * |
| 1555 | * @param bool $wp_using_themes Whether the current request should use themes. |
| 1556 | */ |
| 1557 | return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES ); |
| 1558 | } |
| 1559 | |
| 1560 | /** |
| 1561 | * Determines whether the current request is a WordPress cron request. |
| 1562 | * |
| 1563 | * @since 4.8.0 |
| 1564 | * |
| 1565 | * @return bool True if it's a WordPress cron request, false otherwise. |
| 1566 | */ |