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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 |
---|---|
1519 | /** |
1520 | * Fires immediately before a specific site transient is deleted. |
1521 | * |
1522 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
1523 | * |
1524 | * @since 3.0.0 |
1525 | * |
1526 | * @param string $transient Transient name. |
1527 | */ |
1528 | do_action( "delete_site_transient_{$transient}", $transient ); |
1529 |
|
1530 | if ( wp_using_ext_object_cache() ) { |
1531 | $result = wp_cache_delete( $transient, 'site-transient' ); |
1532 | } else { |
1533 | $option_timeout = '_site_transient_timeout_' . $transient; |
1534 | $option = '_site_transient_' . $transient; |
1535 | $result = delete_site_option( $option ); |
1536 | if ( $result ) |
1537 | delete_site_option( $option_timeout ); |