Cancels a pending HTTP request

# EventHttpRequest::cancel

(PECL event >= 1.4.0-beta)

EventHttpRequest::cancel — Cancels a pending HTTP request

### 说明

public function EventHttpRequest::cancel(): void

Cancels a pending HTTP request.

Cancels an ongoing HTTP request. The callback associated with this request is not executed and the request object is freed. If the request is currently being processed, e.g. it is ongoing, the corresponding EventHttpConnection object is going to get reset.

A request cannot be canceled if its callback has executed already. A request may be canceled reentrantly from its chunked callback.

### 参数

此函数没有参数。

### 返回值

没有返回值。

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