OpenSwoole MMap (Depreciation)

OpenSwoole provides the api to use mmap for files access. This is useful when multiple threads or processes accessing data in a read only fashion from the same file.

Example

<?php
$file = __DIR__.'/data.dat';
$size = 8192;
if (!is_file($file)) {
    file_put_contents($file, str_repeat("\0", $size));
}

$fp = OpenSwoole\mmap::open($file, 8192);

fwrite($fp, "hello world\n");
fwrite($fp, "hello OpenSwoole\n");

fflush($fp);
fclose($fp);

OpenSwoole\Mmap->open($file, $size = -1, $offset = 0)

Alias: function swoole_mmap->open($file, $size = -1, $offset = 0)

Map a file into memory and return a stream resource which can be used by PHP stream operations.

Methods to use mmap in PHP

• fread: read data from mmap stream
• fgets: read data from mmap stream
• fwrite: write data to mmap stream
• fputs: write data to mmap stream
• fflush: sync data on the disk file
• fclose: sync data on the disk file and close the file