PHP Manual
EventBuffer
Copies out specified number of bytes from the front of the buffer

EventBuffer::copyout

(PECL event >= 1.2.6-beta)

EventBuffer::copyout — Copies out specified number of bytes from the front of the buffer

说明

public EventBuffer::copyout ( string &$data , int $max_bytes ) : int

Behaves just like EventBuffer::read() , but does not drain any data from the buffer. I.e. it copies the first max_bytes bytes from the front of the buffer into data . If there are fewer than max_bytes bytes available, the function copies all the bytes there are.

参数

data: Output string.
max_bytes: The number of bytes to copy.

返回值

Returns the number of bytes copied, or -1 on failure.

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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