- 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
Returns true on success or false on failure.
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
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