SyncSharedMemory::first

(PECL sync >= 1.1.0)

SyncSharedMemory::first — Check to see if the object is the first instance system-wide of named shared memory

Descrizione

public SyncSharedMemory::first(): bool

Retrieves the system-wide first instance status of a SyncSharedMemory object.

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

Esempi

Example #1 SyncSharedMemory::first() example

<?php
$mem = new SyncSharedMemory("AppReportName", 1024);
if ($mem->first())
{
    // Do first time initialization work here.
}

var_dump($mem->first());

$mem2 = new SyncSharedMemory("AppReportName", 1024);

var_dump($mem2->first());
?>

Il precedente esempio visualizzerà qualcosa simile a:

bool(true)
bool(false)

Vedere anche:

SyncSharedMemory::write() - Copy data to named shared memory
SyncSharedMemory::read() - Copy data from named shared memory

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