# EventBuffer::freeze

(PECL event >= 1.2.6-beta)

EventBuffer::freeze — Prevent calls that modify an event buffer from succeeding

### 说明

public EventBuffer::freeze( bool `$at_front` ): bool

Prevent calls that modify an event buffer from succeeding

### 参数

`at_front`

  Whether to disable changes to the front or end of the buffer.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 参见

- EventBuffer::unfreeze() - Re-enable calls that modify an event buffer

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