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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 |
---|---|
1289 | /** |
1290 | * Fires immediately before a specific site transient is deleted. |
1291 | * |
1292 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
1293 | * |
1294 | * @since 3.0.0 |
1295 | * |
1296 | * @param string $transient Transient name. |
1297 | */ |
1298 | do_action( 'delete_site_transient_' . $transient, $transient ); |
1299 |
|
1300 | if ( wp_using_ext_object_cache() ) { |
1301 | $result = wp_cache_delete( $transient, 'site-transient' ); |
1302 | } else { |
1303 | $option_timeout = '_site_transient_timeout_' . $transient; |
1304 | $option = '_site_transient_' . $transient; |
1305 | $result = delete_site_option( $option ); |
1306 | if ( $result ) |
1307 | delete_site_option( $option_timeout ); |