SyncSharedMemory::read
Copy data from named shared memory
Description
public SyncSharedMemory::read(int $start = 0, int $length = ?)
Parameters
-
start
-
The start/offset, in bytes, to begin reading.
Note:
If the value is negative, the starting position will begin at the specified
number of bytes from the end of the shared memory segment.
-
length
-
The number of bytes to read.
Note:
If unspecified, reading will stop at the end of the shared memory segment.
If the value is negative, reading will stop the specified number of bytes
from the end of the shared memory segment.
Return Values
A string containing the data read from shared memory.
Examples
Example #1 SyncSharedMemory::__construct example
<?php
// You will probably need to protect shared memory with other synchronization objects.
// Shared memory goes away when the last reference to it disappears.
$mem = new SyncSharedMemory("AppReportName", 1024);
if ($mem->first())
{
// Do first time initialization work here.
}
$result = $mem->write("report.txt");
$result = $mem->read(3, -4);
var_dump($result);
?>
The above example will output
something similar to:
See Also
- SyncSharedMemory::__construct
- SyncSharedMemory::first
- SyncSharedMemory::write
- SyncSharedMemory::read