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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

說(shuō)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.

參數

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

返回值

成功時(shí)返回 true，或者在失敗時(shí)返回 false。

參見(jiàn)

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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