Re-configures timer event

# Event::setTimer

(PECL event >= 1.2.6-beta)

Event::setTimer — Re-configures timer event

### 说明

public function Event::setTimer( EventBase `$base` , callable `$cb` , mixed `$arg` = ?): bool

Re-configures timer event. Note, this function doesn't invoke obsolete libevent's `event_set`. It calls `event_assign` instead.

### 参数

`base`

  The event base to associate with.

`cb`

  The timer event callback. See Event callbacks.

`arg`

  Custom data. If specified, it will be passed to the callback when event triggers.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 参见

- Event::__construct() - Constructs Event object
- Event::timer() - Constructs timer event object

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