略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: SyncSharedMemory::first

2024-11-14

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 SyncSharedMemory::first(): bool

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

参数

此函数没有参数。

返回值

成功时返回 true, 或者在失败时返回 false

范例

示例 #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

add a noteadd a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/syncsharedmemory.first.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3