eio_write
(PECL eio >= 0.0.1dev)
eio_write — Write to file
说明
eio_write
( mixed
$fd
, string $str
[, int $length
= 0
[, int $offset
= 0
[, int $pri
= EIO_PRI_DEFAULT
[, callable $callback
= NULL
[, mixed $data
= NULL
]]]]] ) : resource
eio_write() writes up to length
bytes from str
at offset
offset from the beginning of the file.
参数
-
fd
-
Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open()
-
str
-
Source string
-
length
-
Maximum number of bytes to write.
-
offset
-
Offset from the beginning of file.
-
pri
-
请求的优先级:
EIO_PRI_DEFAULT
,EIO_PRI_MIN
,EIO_PRI_MAX
或NULL
。如果是NULL
,pri
将设为EIO_PRI_DEFAULT
。 -
callback
-
callback
函数在请求完成时被调用。其应匹配一下原型:void callback(mixed $data, int $result[, resource $req]);
-
data
-
传递给请求的用户数据。
-
result
-
针对请求的结果的值。通常是相应的系统调用返回的值。
-
req
-
可选的请求资源,可被 eio_get_last_error() 之类的函数使用。
-
-
data
-
Arbitrary variable passed to
callback
.
返回值
eio_write() returns request resource on success or FALSE
on error.
参见
- eio_open