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