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SyncSharedMemory::read

(PECL sync >= 1.1.0)

SyncSharedMemory::readCopy data from named shared memory

Descripción

public SyncSharedMemory::read ([ int $start = 0 [, int $length ]] )

Copies data from named shared memory.

Parámetros

start

The start/offset, in bytes, to begin reading.

Nota:

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.

Nota:

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.

Valores devueltos

A string containing the data read from shared memory.

Ejemplos

Ejemplo #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);
?>

El resultado del ejemplo sería algo similar a:

string(3) "ort"

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