Php/docs/function.eio-write

• PHP Manual
• Eio 函数
• Write to file

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() - Opens a file