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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 |
|---|---|
| 1408 | * |
| 1409 | * @since 2.8.0 |
| 1410 | * @since 4.4.0 The `$transient` parameter was added |
| 1411 | * |
| 1412 | * @param mixed $pre_transient The default value to return if the transient does not exist. |
| 1413 | * Any value other than false will short-circuit the retrieval |
| 1414 | * of the transient, and return that value. |
| 1415 | * @param string $transient Transient name. |
| 1416 | */ |
| 1417 | $pre = apply_filters( "pre_transient_{$transient}", false, $transient ); |
| 1418 | |
| 1419 | if ( false !== $pre ) { |
| 1420 | return $pre; |
| 1421 | } |
| 1422 | |
| 1423 | if ( wp_using_ext_object_cache() || wp_installing() ) { |
| 1424 | $value = wp_cache_get( $transient, 'transient' ); |
| 1425 | } else { |
| 1426 | $transient_option = '_transient_' . $transient; |