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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 |
|---|---|
| 1678 | /** |
| 1679 | * Fires immediately before a specific site transient is deleted. |
| 1680 | * |
| 1681 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
| 1682 | * |
| 1683 | * @since 3.0.0 |
| 1684 | * |
| 1685 | * @param string $transient Transient name. |
| 1686 | */ |
| 1687 | do_action( "delete_site_transient_{$transient}", $transient ); |
| 1688 | |
| 1689 | if ( wp_using_ext_object_cache() ) { |
| 1690 | $result = wp_cache_delete( $transient, 'site-transient' ); |
| 1691 | } else { |
| 1692 | $option_timeout = '_site_transient_timeout_' . $transient; |
| 1693 | $option = '_site_transient_' . $transient; |
| 1694 | $result = delete_site_option( $option ); |
| 1695 | if ( $result ) { |
| 1696 | delete_site_option( $option_timeout ); |