PHP 8.4.0 RC4 available for testing

SyncSharedMemory::read

(PECL sync >= 1.1.0)

SyncSharedMemory::readCopy data from named shared memory

Опис

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

Copies data from named shared memory.

Параметри

start

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

Зауваження:

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.

Зауваження:

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.

Значення, що повертаються

A string containing the data read from shared memory.

Приклади

Приклад #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);
?>

Поданий вище приклад виведе щось схоже на:

string(3) "ort"

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