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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 |
|---|---|
| 2229 | /** |
| 2230 | * Fires immediately before a specific site transient is deleted. |
| 2231 | * |
| 2232 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
| 2233 | * |
| 2234 | * @since 3.0.0 |
| 2235 | * |
| 2236 | * @param string $transient Transient name. |
| 2237 | */ |
| 2238 | do_action( "delete_site_transient_{$transient}", $transient ); |
| 2239 | |
| 2240 | if ( wp_using_ext_object_cache() || wp_installing() ) { |
| 2241 | $result = wp_cache_delete( $transient, 'site-transient' ); |
| 2242 | } else { |
| 2243 | $option_timeout = '_site_transient_timeout_' . $transient; |
| 2244 | $option = '_site_transient_' . $transient; |
| 2245 | $result = delete_site_option( $option ); |
| 2246 | |
| 2247 | if ( $result ) { |