# EvCheck::__construct

(PECL ev >= 0.2.0)

EvCheck::__construct — Constructs the EvCheck watcher object

### 说明

public EvCheck::__construct( callable `$callback` , mixed `$data` = ?, int `$priority` = ?)

Constructs the EvCheck watcher object.

### 参数

`callback`
  See Watcher callbacks.
`data`
  Custom data associated with the watcher.
`priority`
  Watcher priority

### 参见

- EvPrepare
- EvLoop::check() - Creates EvCheck object associated with the current event loop instance

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