eio_seek

(PECL eio >= 0.5.0b)

Repositions the offset of the open file associated with the fd argument to the argument offset according to the directive whence

resource eio_seek ( mixed $fd, int $offset, int $whence [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]] )

eio_seek() repositions the offset of the open file associated with stream, Socket resource, or file descriptor specified by fd to the argument offset according to the directive whence as follows:

EIO_SEEK_SET - Set position equal to offset bytes.
EIO_SEEK_CUR - Set position to current location plus offset.
EIO_SEEK_END - Set position to end-of-file plus offset.

Parameters:

Stream, Socket resource, or numeric file descriptor

offset

Starting point from which data is to be read.

length

Number of bytes to be read.

pri

The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, pri internally is set to EIO_PRI_DEFAULT.

callback

callback function is called when the request is done. It should match the following prototype:

void callback(mixed $data, int $result[, resource $req]);

data

Arbitrary variable passed to callback.

Returns:

eio_seek() returns request resource on success or FALSE on error.

Links:

http://php.net/manual/en/function.eio-seek.php

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2016-02-24 16:04:44

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