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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 |
|---|---|
| 589 | * Passing a truthy value to the filter will effectively short-circuit retrieval |
| 590 | * of the transient, returning the passed value instead. |
| 591 | * |
| 592 | * @since 2.8.0 |
| 593 | * |
| 594 | * @param mixed $pre_transient The default value to return if the transient does not exist. |
| 595 | * Any value other than false will short-circuit the retrieval |
| 596 | * of the transient, and return the returned value. |
| 597 | */ |
| 598 | $pre = apply_filters( 'pre_transient_' . $transient, false ); |
| 599 | if ( false !== $pre ) |
| 600 | return $pre; |
| 601 | |
| 602 | if ( wp_using_ext_object_cache() ) { |
| 603 | $value = wp_cache_get( $transient, 'transient' ); |
| 604 | } else { |
| 605 | $transient_option = '_transient_' . $transient; |
| 606 | if ( ! defined( 'WP_INSTALLING' ) ) { |
| 607 | // If option is not in alloptions, it is not autoloaded and thus has a timeout |