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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 |
|---|---|
| 2409 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
| 2410 | * |
| 2411 | * @since 3.0.0 |
| 2412 | * @since 4.4.0 The `$transient` parameter was added |
| 2413 | * |
| 2414 | * @param mixed $value Site transient value. |
| 2415 | * @param int $expiration Time until expiration in seconds. |
| 2416 | * @param string $transient Transient name. |
| 2417 | */ |
| 2418 | do_action( "set_site_transient_{$transient}", $value, $expiration, $transient ); |
| 2419 | |
| 2420 | /** |
| 2421 | * Fires after the value for a site transient has been set. |
| 2422 | * |
| 2423 | * @since 3.0.0 |
| 2424 | * |
| 2425 | * @param string $transient The name of the site transient. |
| 2426 | * @param mixed $value Site transient value. |
| 2427 | * @param int $expiration Time until expiration in seconds. |