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eio_readahead

PHP function Edit on GitHub ✎

(PECL eio >= 0.0.1dev)

Perform file readahead into page cache

Description

eio_readahead(mixed $fd, int $offset, int $length, int $pri = EIO_PRI_DEFAULT, callable $callback = NULL, mixed $data = NULL): resource

eio_readahead() populates the page cache with data from a file so that subsequent reads from that file will not block on disk I/O. See READAHEAD(2) man page for details.

Parameters

fd: 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: Values
callback: Proto
data: Arbitrary variable passed to callback.

Return Values

eio_readahead() returns request resource on success,Falseforfailure.

Source: reference/eio/functions/eio-readahead.xml · from the official PHP manual (php/doc-en)