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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 |
|---|---|
| 567 | * Passing a truthy value to the filter will effectively short-circuit retrieval |
| 568 | * of the transient, returning the passed value instead. |
| 569 | * |
| 570 | * @since 2.8.0 |
| 571 | * |
| 572 | * @param mixed $pre_transient The default value to return if the transient does not exist. |
| 573 | * Any value other than false will short-circuit the retrieval |
| 574 | * of the transient, and return the returned value. |
| 575 | */ |
| 576 | $pre = apply_filters( 'pre_transient_' . $transient, false ); |
| 577 | if ( false !== $pre ) |
| 578 | return $pre; |
| 579 | |
| 580 | if ( wp_using_ext_object_cache() ) { |
| 581 | $value = wp_cache_get( $transient, 'transient' ); |
| 582 | } else { |
| 583 | $transient_option = '_transient_' . $transient; |
| 584 | if ( ! defined( 'WP_INSTALLING' ) ) { |
| 585 | // If option is not in alloptions, it is not autoloaded and thus has a timeout |