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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 |
|---|---|
| 1528 | /** |
| 1529 | * Fires immediately before a specific site transient is deleted. |
| 1530 | * |
| 1531 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
| 1532 | * |
| 1533 | * @since 3.0.0 |
| 1534 | * |
| 1535 | * @param string $transient Transient name. |
| 1536 | */ |
| 1537 | do_action( "delete_site_transient_{$transient}", $transient ); |
| 1538 | |
| 1539 | if ( wp_using_ext_object_cache() ) { |
| 1540 | $result = wp_cache_delete( $transient, 'site-transient' ); |
| 1541 | } else { |
| 1542 | $option_timeout = '_site_transient_timeout_' . $transient; |
| 1543 | $option = '_site_transient_' . $transient; |
| 1544 | $result = delete_site_option( $option ); |
| 1545 | if ( $result ) |
| 1546 | delete_site_option( $option_timeout ); |