PHP Manual
EventBuffer
Removes specified number of bytes from the front of the buffer without copying it anywhere

EventBuffer::drain

(PECL event >= 1.2.6-beta)

EventBuffer::drain — Removes specified number of bytes from the front of the buffer without copying it anywhere

说明

public EventBuffer::drain ( int $len ) : bool

Behaves as EventBuffer::read() , except that it does not copy the data: it just removes it from the front of the buffer.

参数

len: The number of bytes to remove from the buffer.

返回值

Returns TRUE on success. Otherwise FALSE.

参见

EventBuffer::read() - Read data from an evbuffer and drain the bytes read
EventBuffer::appendFrom() - Moves the specified number of bytes from a source buffer to the end of the current buffer

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