eio_write
(PECL eio >= 0.0.1dev)
eio_write — Write to file
说明
eio_write(
mixed
string
int
int
int
callable
mixed
): resource
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, 或者在失败时返回 false.
参见
- eio_open() - Opens a file
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