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(PECL eio >= 0.0.1dev)
eio_write — Write to file
$fd
, string $str
[, int $length = 0
[, int $offset = 0
[, int $pri = EIO_PRI_DEFAULT
[, callable $callback = NULL
[, mixed $data = NULL
]]]]] ) eio_write() writes up to length
bytes from str at offset
offset from the beginning of the file.
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.
eio_write() returns request resource on success or FALSE on error.