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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 |
|---|---|
| 1658 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
| 1659 | * |
| 1660 | * @since 3.0.0 |
| 1661 | * @since 4.4.0 The `$transient` parameter was added |
| 1662 | * |
| 1663 | * @param mixed $value Site transient value. |
| 1664 | * @param int $expiration Time until expiration in seconds. |
| 1665 | * @param string $transient Transient name. |
| 1666 | */ |
| 1667 | do_action( 'set_site_transient_' . $transient, $value, $expiration, $transient ); |
| 1668 | |
| 1669 | /** |
| 1670 | * Fires after the value for a site transient has been set. |
| 1671 | * |
| 1672 | * @since 3.0.0 |
| 1673 | * |
| 1674 | * @param string $transient The name of the site transient. |
| 1675 | * @param mixed $value Site transient value. |
| 1676 | * @param int $expiration Time until expiration in seconds. |