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SyncSharedMemory::first

(PECL sync >= 1.1.0)

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

说明

public bool SyncSharedMemory::first ( void )

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

参数

此函数没有参数。

返回值

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

范例

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());
?>

以上例程的输出类似于:

bool(true)
bool(false)

参见

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