Swoole内存-table详解

Posted 2021-09-28 wgchen~

Swoole内存-table详解

• 前言
• 创建内存表
• 增删查操作

前言

高性能共享内存 Table

由于 php 语言不支持多线程，因此 Swoole 使用多进程模式，在多进程模式下存在进程内存隔离，在工作进程内修改 global 全局变量和超全局变量时，在其他进程是无效的。

创建内存表

<?php
//创建内存表(1204行)
$table = new swoole_table(1204);

//内存表增加一行（创建字段）
$table->column('id',$table::TYPE_INT,8);
$table->column('name',$table::TYPE_STRING,64);
$table->column('age',$table::TYPE_INT,3);
$table->create();

/*
新增一行内容
第一个参数是key，第二个参数内容
*/
$table->set('willem_swoole',['id'=>1,'name'=>'willem','age'=>29]);

//测试
print_r($table->get('willem_swoole'));

[root@bogon swoole]# php swoole_table.php 
Array
(
    [id] => 1
    [name] => willem
    [age] => 29
)

增删查操作

<?php
//创建内存表(1204行)
$table = new swoole_table(1204);
//内存表增加一行（创建字段）
$table->column('id',$table::TYPE_INT,8);
$table->column('name',$table::TYPE_STRING,64);
$table->column('age',$table::TYPE_INT,3);
$table->create();

/*
新增一行内容
第一个参数是key，第二个参数内容
*/
$table->set('willem_swoole',['id'=>1,'name'=>'willem','age'=>29]);
//另一种方案
$table['willem_swoole2']=[
    'id'=>2,
    'name'=>'willem2',
    'age'=>29,
];
//第一种
// print_r($table->get('willem_swoole2'));

/*运行
//第二种
print_r($table['willem_swoole2']);

[root@localhost memory]# php table.php 
Swoole\\Table\\Row Object
(
    [key] => willem_swoole2
    [value] => Array
        (
            [id] => 2
            [name] => willem2
            [age] => 29
        )

)
[root@localhost memory]# 

//操作字段
$table->incr('willem_swoole2','age',2);//加2
print_r($table['willem_swoole2']);

[root@localhost memory]# php table.php 
Swoole\\Table\\Row Object
(
    [key] => willem_swoole2
    [value] => Array
        (
            [id] => 2
            [name] => willem2
            [age] => 31
        )

)

$table->decr('willem_swoole2','age',2);//减2


//删除操作
$table->decr('willem_swoole2','age',2);//加2
print_r($table['willem_swoole2']);
echo "delete start:".PHP_EOL;
$table->del('willem_swoole2');
print_r($table['willem_swoole2']);

[root@localhost memory]# php table.php 
Swoole\\Table\\Row Object
(
    [key] => willem_swoole2
    [value] => Array
        (
            [id] => 2
            [name] => willem2
            [age] => 27
        )

)
delete start:
Swoole\\Table\\Row Object
(
    [key] => willem_swoole2
    [value] => Array
        (
        )

)
[root@localhost memory]# 

*/
//删除操作
$table->decr('willem_swoole2','age',2);//加2
print_r($table['willem_swoole2']);
echo "delete start:".PHP_EOL;
$table->del('willem_swoole2');
print_r($table['willem_swoole2']);