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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 |
|---|---|
| 1347 | * |
| 1348 | * @since 3.0.0 |
| 1349 | * @since 3.6.0 The `$value` and `$expiration` parameters were added. |
| 1350 | * @since 4.4.0 The `$transient` parameter was added. |
| 1351 | * |
| 1352 | * @param mixed $value Transient value. |
| 1353 | * @param int $expiration Time until expiration in seconds. |
| 1354 | * @param string $transient The name of the transient. |
| 1355 | */ |
| 1356 | do_action( "set_transient_{$transient}", $value, $expiration, $transient ); |
| 1357 | |
| 1358 | /** |
| 1359 | * Fires after the value for a transient has been set. |
| 1360 | * |
| 1361 | * @since 3.0.0 |
| 1362 | * @since 3.6.0 The `$value` and `$expiration` parameters were added. |
| 1363 | * |
| 1364 | * @param string $transient The name of the transient. |
| 1365 | * @param mixed $value Transient value. |