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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PECL event >= 1.5.0)
EventBuffer represents Libevent's "evbuffer", an utility functionality for buffered I/O.
Event buffers are meant to be generally useful for doing the "buffer" part of buffered network I/O.
$data
)$buf
)$buf
, int $len
)&$data
, int $max_bytes
)$len
)$len
)$at_front
)$data
)$buf
)$size
)$max_bytes
)$fd
, int $howmuch
)$eol_style
)$what
[, int $start
= -1
[, int $end
= -1
]] )$start
= -1
[, int $eol_style
=
EventBuffer::EOL_ANY
]] )$start
[, int $length
] )$at_front
)$fd
[, int $howmuch
] )The number of bytes stored in an event buffer.
The number of bytes stored contiguously at the front of the buffer. The bytes in a buffer may be stored in multiple separate chunks of memory; the property returns the number of bytes currently stored in the first chunk.
EventBuffer::EOL_ANY
The end of line is any sequence of any number of carriage return and linefeed characters. This format is not very useful; it exists mainly for backward compatibility.
EventBuffer::EOL_CRLF
The end of the line is an optional carriage return, followed by a linefeed. (In other words, it is either a "\r\n" or a "\n" .) This format is useful in parsing text-based Internet protocols, since the standards generally prescribe a "\r\n" line-terminator, but nonconformant clients sometimes say just "\n" .
EventBuffer::EOL_CRLF_STRICT
The end of a line is a single carriage return, followed by a single
linefeed. (This is also known as
"\r\n"
. The ASCII values are
0x0D
0x0A
).
EventBuffer::EOL_LF
The end of a line is a single linefeed character. (This is also known
as
"\n"
. It is ASCII value is
0x0A
.)
EventBuffer::PTR_SET
Flag used as argument of EventBuffer::setPosition() method. If this flag specified, the position pointer is moved to an absolute position within the buffer.
EventBuffer::PTR_ADD
The same as
EventBuffer::PTR_SET
, except this flag causes
EventBuffer::setPosition()
method to move position forward up to the specified number of
bytes(instead of setting absolute position).