Php/docs/syncsharedmemory.first

• PHP Manual
• SyncSharedMemory
• Check to see if the object is the first instance system-wide of named shared memory

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

Description

public SyncSharedMemory::first ( ) : bool

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

Parameters

This function has no parameters.

Return Values

A boolean of TRUE if the object is the first instance system-wide, FALSE otherwise.

Examples

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());?>

The above example will output something similar to:

bool(true)
bool(false)

See Also

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